Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter.It is the total power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity (signal strength or power flux density in watts per Antenna Technologies Limited Company (ATLC), is the leader in design and manufacturing of Commercial Enterprise and Defense Wireless applications and has been dedicated to providing innovative, standard and custom antenna solutions from design through manufacturing to their customers worldwide. Below is a quarter wave ground plane antenna I made for 23cm, 1296MHz which is made from off-cuts of household mains copper wire and a scrap BNC socket from the junk box. 329 - Two-Element Delta Loop Beam for 20m,10m. The reflected waves thus form the missing part of the vertical dipole antenna. Over on his blog Adam 9A4QV (seller of various RTL-SDR related goods including the LNA4ALL) has just made a post detailing a build of a high performance super simple NOAA/Meteor M2 weather satellite antenna. Figure 21 (7:1 turns ratio), then the expected SWR for a vertical monopole operated against ground is shown below (fig. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational RFI has one of the largest, most innovative and experienced wireless solutions teams with specialist engineers, product managers, deployment engineers, logistics, distribution and R&D staff. Antenna Technologies Limited Company (ATLC), is the leader in design and manufacturing of Commercial Enterprise and Defense Wireless applications and has been dedicated to providing innovative, standard and custom antenna solutions from design through manufacturing to their customers worldwide. The antenna consists of two metal rods connected to a receiver R.The electric field (E, green arrows) of the incoming wave pushes the electrons in the rods back and forth, charging the ends alternately positive (+) and negative ().Since the length of the antenna is one half the wavelength of the wave, the Particularly, wire antennas such as the short dipole and half-wave dipole antennas are presented, aperture, patch, reflector and travelling wave antenna types are presented. This was done for a few reasons We believe that the dipole kit is much more versatile and will enable beginners to get better reception straight away Magnets of any type are difficult to ship as they are not allowed 330 - Bidirectional Array Antenna W8JK for 20m to 10m RF-398-02/03 VHF Low-Band Vertical Dipole Antenna. RF-3143TB-AT32X Tri-Band Vehicular Antenna. Omnidirectional radiation patterns are produced by the simplest practical antennas, monopole and dipole antennas, consisting of one or two straight rod conductors on a common axis.Antenna gain (G) is defined as antenna efficiency (e) multiplied by antenna directivity (D) which is expressed mathematically as: =.A useful relationship between omnidirectional radiation RF-3080-AT001 Portable UHF SATCOM Antenna. RF-3143TB-AT32X Tri-Band Vehicular Antenna. RF-9072-AT001 Low-Band VHF Discone Antenna. This causes radiation at the two edges of the antenna, as shown by the fringing fields in the diagram. A monopole antenna needs a physical ground plane. 324 - Monopole Antenna Loaded with Folded Dipole for 23cm. Building a folded dipole is stressful and more complicated than a monopole antenna; Related FAQs About How To Build A Dipole Antenna. Building a folded dipole is stressful and more complicated than a monopole antenna; Related FAQs About How To Build A Dipole Antenna. Over on our store we now sell our dongles with a receive only dipole antenna kit that replaces the older magnetic whip style antennas from the previous kit. Figure 21 Returning to Figure 11.14, the microstrip feed is inset into the antenna a distance x to obtain an input match. 324 - Monopole Antenna Loaded with Folded Dipole for 23cm. 327 - Marconi Ribbon Line Antenna for 80m. He began by using dipole antennas invented by Heinrich Hertz consisting of two identical horizontal wires ending in metal plates. Using image theory, the fields above the ground plane can be found by using the Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).Radio waves with frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range. Omnidirectional radiation patterns are produced by the simplest practical antennas, monopole and dipole antennas, consisting of one or two straight rod conductors on a common axis.Antenna gain (G) is defined as antenna efficiency (e) multiplied by antenna directivity (D) which is expressed mathematically as: =.A useful relationship between omnidirectional radiation Commonly known as an omnidirectional antennas, all dipole antennas have a generalized radiation pattern. A dipole antenna is an effective and powerful antenna that provides a great performance level when erected or installed as high as possible- where it cant be affected by obstructions. This causes radiation at the two edges of the antenna, as shown by the fringing fields in the diagram. Due to the capacitance, it only works as a circuit for high frequency alternating current. Returning to Figure 11.14, the microstrip feed is inset into the antenna a distance x to obtain an input match. RF-398-01 VHF Low-Band Vertical Monopole Antenna. Over on our store we now sell our dongles with a receive only dipole antenna kit that replaces the older magnetic whip style antennas from the previous kit. A list of different antennas (antenna types) with links to detailed descriptions. Hence, a monopole antenna is a perfect conducting antenna. RFI has one of the largest, most innovative and experienced wireless solutions teams with specialist engineers, product managers, deployment engineers, logistics, distribution and R&D staff. Monopole above a PEC (a), and the equivalent source in free space (b). RF-9072-AT001 Low-Band VHF Discone Antenna. Most antenna designs for polar orbiting weather spacecraft are based on circularly polarized turnstile or QFH designs. 329 - Two-Element Delta Loop Beam for 20m,10m. The case of a monopole antenna of length L mounted above an infinite ground plane is shown in Figure 1(a).. RF-398-01 VHF Low-Band Vertical Monopole Antenna. This antenna simply uses a radiator to produce a synthetic ground plane in between the elements of a symmetric radiator. The donut-shaped elevation pattern shows that a dipole antenna is best used to transmit and receive from the broadside of the antenna and is very sensitive to matching horizontal positioning and any movement away from a perfectly vertical position. Since this dipole is half the wavelength, we can leave the formula in this way to calculate a 20 Mhz dipole antenna: Dipole length = 142.5 / F (in Megahertz) L = 142.5 / 20 Mhz = 7.125 meters. A half-wave dipole antenna consists of two quarter-wavelength conductors placed end to end for a total length of approximately L = /2.The current distribution is that of a standing wave, approximately sinusoidal along the length of the dipole, with a node at each end and an antinode (peak current) at the center (feedpoint): = ,where k = 2/ and z runs from L/2 to L/2. For example, a loop antenna is clearly a circuit. The antenna calculator assumes the antenna will be mounted on a mast, and not be close to actual ground. Omnidirectional radiation patterns are produced by the simplest practical antennas, monopole and dipole antennas, consisting of one or two straight rod conductors on a common axis.Antenna gain (G) is defined as antenna efficiency (e) multiplied by antenna directivity (D) which is expressed mathematically as: =.A useful relationship between omnidirectional radiation However for this to be true, the antenna RF earth must be perfectly conducting. Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. It is a type of monopole antenna. Hence the addition of ground plane elements. Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. 5.3.5 The Sleeve Dipole and Monopole 238 5.3.6 The Bowtie and Other Wideband Dipoles 241 5.3.7 The Folded Dipole 241 5.3.8 Microstrip Dipoles 246 5.3.9 Other Wire Antenna Structures 247 5.3.10 Broadband Flared-Notch, Vivaldi, and Cavity-Backed Antennas 248 5.4 Aperture Antenna Elements 251 5.4.1 Slot Elements 252 5.4.2 Waveguide Radiators 254 Whip antennas less than one-half wavelength long, including the common quarter wave So a monopole mounted over an ideal ground plane has a radiation pattern identical to a dipole antenna. The donut-shaped elevation pattern shows that a dipole antenna is best used to transmit and receive from the broadside of the antenna and is very sensitive to matching horizontal positioning and any movement away from a perfectly vertical position. The types of monopole antenna include umbrella antenna. If we have an Ohmmeter for high frequency AC then we will see the resistance figure. The 7 meters is the total length of the dipole. Figure 7.1 illustrates operation of a basic half-wave resonant dipole antenna. Particularly, wire antennas such as the short dipole and half-wave dipole antennas are presented, aperture, patch, reflector and travelling wave antenna types are presented. Stutzman's 3rd edition of Antenna Theory and Design provides a more pedagogical approach with a greater emphasis on computational methods. Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter.It is the total power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity (signal strength or power flux density in watts per The reflected waves thus form the missing part of the vertical dipole antenna. 330 - Bidirectional Array Antenna W8JK for 20m to 10m The antenna calculator assumes the antenna will be mounted on a mast, and not be close to actual ground. A reflector antenna can also significantly simplify the radar electronics, making it ideal for implementing radar on much smaller spacecraft such as SSTLs CarbSAR platform. Figure 1. Whip antennas less than one-half wavelength long, including the common quarter wave Animated diagram of a half-wave dipole antenna receiving a radio wave. A simple and intuitive technique for modeling this The dimension b is chosen so that the cavity formed by the conductor on the top plane of the structure is resonant. The balanced nature of the ideal circuit ensures that identical current will exist on each side of the dipole. A reflector antenna can also significantly simplify the radar electronics, making it ideal for implementing radar on much smaller spacecraft such as SSTLs CarbSAR platform. Ultra high frequency (UHF) is the ITU designation for radio frequencies in the range between 300 megahertz (MHz) and 3 gigahertz (GHz), also known as the decimetre band as the wavelengths range from one meter to one tenth of a meter (one decimeter).Radio waves with frequencies above the UHF band fall into the super-high frequency (SHF) or microwave frequency range. The dipole, monopole, array, and large loop antenna types discussed below typically function as resonant antennas; with the monopole and its image forming a dipole, so the monopole antenna has a radiation pattern identical to the top half of the pattern of a similar dipole antenna. Figure 21 (7:1 turns ratio), then the expected SWR for a vertical monopole operated against ground is shown below (fig. It is a type of monopole antenna. Every antenna is a complete circuit. In a monopole antenna, the radiation pattern of the monopole plus the virtual "image antenna" make it appear as a two element center-fed dipole antenna. Hertzs dipole, the Hertzian dipole, was very short relative to the wavelength of the wave (which he could determine by moving around his apparatus) and was thus quite inefficient, but it shows how you could radiate from even a very electrically short antenna. For a dipole, this circuit is formed by the two wires and the capacitance between them. Figure 1. A half-wave dipole antenna consists of two quarter-wavelength conductors placed end to end for a total length of approximately L = /2.The current distribution is that of a standing wave, approximately sinusoidal along the length of the dipole, with a node at each end and an antinode (peak current) at the center (feedpoint): = ,where k = 2/ and z runs from L/2 to L/2. 327 - Marconi Ribbon Line Antenna for 80m. This causes radiation at the two edges of the antenna, as shown by the fringing fields in the diagram. Quarter-Wave Monopole Antenna. Particularly, wire antennas such as the short dipole and half-wave dipole antennas are presented, aperture, patch, reflector and travelling wave antenna types are presented. As the dipole antennas, the monopole antennas are also omni-directional, this means they transmit and receive equally well in a 360 degree plane around their axis. Since a half-wave dipole has a radiation resistance of 73 ohms, a quarter-wave monopole will have a radiation resistance of about 36.8 ohms if it is mounted above a good ground plane. The types of monopole antenna include umbrella antenna. Shown in Figure 7.1(a) is a dipole antenna excited from an RF source. This means that an exceedingly good antenna RF ground is required. The dimension b is chosen so that the cavity formed by the conductor on the top plane of the structure is resonant. Monopole above a PEC (a), and the equivalent source in free space (b). RF-3080-AT001 Portable UHF SATCOM Antenna. The monopole antenna was invented in 1895 and patented in 1896 by radio pioneer Guglielmo Marconi during his historic first experiments in radio communication. Figure 7.1 illustrates operation of a basic half-wave resonant dipole antenna. The types of monopole antenna include umbrella antenna. RFI has one of the largest, most innovative and experienced wireless solutions teams with specialist engineers, product managers, deployment engineers, logistics, distribution and R&D staff. Figure 1. The umbrella antenna is generally used as the transmitter at frequencies below 1MHz. Dipole Antenna: Monopole Antenna: This antenna belongs to the linear antenna category. Using image theory, the fields above the ground plane can be found by using the Quarter-Wave Monopole Antenna. This was done for a few reasons We believe that the dipole kit is much more versatile and will enable beginners to get better reception straight away Magnets of any type are difficult to ship as they are not allowed Monopole above a PEC (a), and the equivalent source in free space (b). Since this dipole is half the wavelength, we can leave the formula in this way to calculate a 20 Mhz dipole antenna: Dipole length = 142.5 / F (in Megahertz) L = 142.5 / 20 Mhz = 7.125 meters. Most antenna designs for polar orbiting weather spacecraft are based on circularly polarized turnstile or QFH designs. Hertzs dipole, the Hertzian dipole, was very short relative to the wavelength of the wave (which he could determine by moving around his apparatus) and was thus quite inefficient, but it shows how you could radiate from even a very electrically short antenna. He found by experiment that if instead of the dipole, one side of the transmitter and A dipole antenna is an effective and powerful antenna that provides a great performance level when erected or installed as high as possible- where it cant be affected by obstructions. Monopole antenna also belongs to the linear antenna category. 325 - Lazy-H Antenna for 20m,17m,15m,12,10m. Most antenna designs for polar orbiting weather spacecraft are based on circularly polarized turnstile or QFH designs. We are a global antenna systems specialist, with a dedicated US team providing sales and engineering support, backed by our global support team. The one pictured below is for receiving ADS-B aircraft signals on 1090MHz, again using scrap copper, but this time a purchased N-Type chassis socket. 327 - Marconi Ribbon Line Antenna for 80m. RF-3080-AT001 Portable UHF SATCOM Antenna. Hence, a monopole antenna is a perfect conducting antenna. 330 - Bidirectional Array Antenna W8JK for 20m to 10m A list of different antennas (antenna types) with links to detailed descriptions. The wavelength is obtained by dividing the speed of light by the frequency. 326 - Multee Antenna for 160m,80m,40m. An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. Animated diagram of a half-wave dipole antenna receiving a radio wave. We are a global antenna systems specialist, with a dedicated US team providing sales and engineering support, backed by our global support team. The 7 meters is the total length of the dipole. 21). The dipole, monopole, array, and large loop antenna types discussed below typically function as resonant antennas; with the monopole and its image forming a dipole, so the monopole antenna has a radiation pattern identical to the top half of the pattern of a similar dipole antenna. Due to the capacitance, it only works as a circuit for high frequency alternating current. In a monopole antenna, the radiation pattern of the monopole plus the virtual "image antenna" make it appear as a two element center-fed dipole antenna. Hence the addition of ground plane elements. 328 - WARC Tri-Band Antenna for 30m,17m,12m. Over on our store we now sell our dongles with a receive only dipole antenna kit that replaces the older magnetic whip style antennas from the previous kit. Note that a perfect match occurs when the vertical is about 0.47 wave lengths tall. RF-3192C-AT422 Rapid Deployable UHF Log Periodic Antenna Set. For a dipole, this circuit is formed by the two wires and the capacitance between them. Commonly known as an omnidirectional antennas, all dipole antennas have a generalized radiation pattern. Building a folded dipole is stressful and more complicated than a monopole antenna; Related FAQs About How To Build A Dipole Antenna. However for this to be true, the antenna RF earth must be perfectly conducting. The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna's axis), with the radiated power falling off with elevation angle to zero on the antenna's axis. A monopole antenna is one half of a dipole antenna, almost always mounted above some sort of ground plane. Below is a quarter wave ground plane antenna I made for 23cm, 1296MHz which is made from off-cuts of household mains copper wire and a scrap BNC socket from the junk box. 5.3.5 The Sleeve Dipole and Monopole 238 5.3.6 The Bowtie and Other Wideband Dipoles 241 5.3.7 The Folded Dipole 241 5.3.8 Microstrip Dipoles 246 5.3.9 Other Wire Antenna Structures 247 5.3.10 Broadband Flared-Notch, Vivaldi, and Cavity-Backed Antennas 248 5.4 Aperture Antenna Elements 251 5.4.1 Slot Elements 252 5.4.2 Waveguide Radiators 254 The wavelength is obtained by dividing the speed of light by the frequency. The case of a monopole antenna of length L mounted above an infinite ground plane is shown in Figure 1(a).. Due to the capacitance, it only works as a circuit for high frequency alternating current. Dipole Antenna: Monopole Antenna: This antenna belongs to the linear antenna category. He found by experiment that if instead of the dipole, one side of the transmitter and RF-9072-AT001 Low-Band VHF Discone Antenna. The antenna calculator assumes the antenna will be mounted on a mast, and not be close to actual ground. We are a global antenna systems specialist, with a dedicated US team providing sales and engineering support, backed by our global support team. RF-398-01 VHF Low-Band Vertical Monopole Antenna. Every antenna is a complete circuit. This was done for a few reasons We believe that the dipole kit is much more versatile and will enable beginners to get better reception straight away Magnets of any type are difficult to ship as they are not allowed A reflector antenna can also significantly simplify the radar electronics, making it ideal for implementing radar on much smaller spacecraft such as SSTLs CarbSAR platform. Returning to Figure 11.14, the microstrip feed is inset into the antenna a distance x to obtain an input match. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. However, Adams Hence, a monopole antenna is a perfect conducting antenna. 329 - Two-Element Delta Loop Beam for 20m,10m. A half-wave dipole antenna consists of two quarter-wavelength conductors placed end to end for a total length of approximately L = /2.The current distribution is that of a standing wave, approximately sinusoidal along the length of the dipole, with a node at each end and an antinode (peak current) at the center (feedpoint): = ,where k = 2/ and z runs from L/2 to L/2. As the dipole antennas, the monopole antennas are also omni-directional, this means they transmit and receive equally well in a 360 degree plane around their axis. 3. The monopole antenna was invented in 1895 and patented in 1896 by radio pioneer Guglielmo Marconi during his historic first experiments in radio communication. 326 - Multee Antenna for 160m,80m,40m. Since this dipole is half the wavelength, we can leave the formula in this way to calculate a 20 Mhz dipole antenna: Dipole length = 142.5 / F (in Megahertz) L = 142.5 / 20 Mhz = 7.125 meters. This means that an exceedingly good antenna RF ground is required. Current near the ends of the dipole is of necessity small, vanishing at the ends, because electrons, whose movement The dimension b is chosen so that the cavity formed by the conductor on the top plane of the structure is resonant. The donut-shaped elevation pattern shows that a dipole antenna is best used to transmit and receive from the broadside of the antenna and is very sensitive to matching horizontal positioning and any movement away from a perfectly vertical position. The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna's axis), with the radiated power falling off with elevation angle to zero on the antenna's axis. Hence the addition of ground plane elements. The monopole antenna was invented in 1895 and patented in 1896 by radio pioneer Guglielmo Marconi during his historic first experiments in radio communication. RF-3192C-AT422 Rapid Deployable UHF Log Periodic Antenna Set. RF-398-02/03 VHF Low-Band Vertical Dipole Antenna. Shown in Figure 7.1(a) is a dipole antenna excited from an RF source. Every antenna is a complete circuit. Quarter-Wave Monopole Antenna. Shown in Figure 7.1(a) is a dipole antenna excited from an RF source. In a monopole antenna, the radiation pattern of the monopole plus the virtual "image antenna" make it appear as a two element center-fed dipole antenna. A monopole antenna needs a physical ground plane. A monopole antenna is one half of a dipole antenna, almost always mounted above some sort of ground plane. Over on his blog Adam 9A4QV (seller of various RTL-SDR related goods including the LNA4ALL) has just made a post detailing a build of a high performance super simple NOAA/Meteor M2 weather satellite antenna. 328 - WARC Tri-Band Antenna for 30m,17m,12m. He began by using dipole antennas invented by Heinrich Hertz consisting of two identical horizontal wires ending in metal plates. The wavelength is obtained by dividing the speed of light by the frequency. 324 - Monopole Antenna Loaded with Folded Dipole for 23cm. He began by using dipole antennas invented by Heinrich Hertz consisting of two identical horizontal wires ending in metal plates. 326 - Multee Antenna for 160m,80m,40m. A dipole antenna is an effective and powerful antenna that provides a great performance level when erected or installed as high as possible- where it cant be affected by obstructions. Note that a perfect match occurs when the vertical is about 0.47 wave lengths tall. An End Fed Half Wave Length Antenna is a variation of the much more common half wave length dipole antenna. Since a half-wave dipole has a radiation resistance of 73 ohms, a quarter-wave monopole will have a radiation resistance of about 36.8 ohms if it is mounted above a good ground plane. If we have an Ohmmeter for high frequency AC then we will see the resistance figure. Antenna Technologies Limited Company (ATLC), is the leader in design and manufacturing of Commercial Enterprise and Defense Wireless applications and has been dedicated to providing innovative, standard and custom antenna solutions from design through manufacturing to their customers worldwide. As the dipole antennas, the monopole antennas are also omni-directional, this means they transmit and receive equally well in a 360 degree plane around their axis. Current near the ends of the dipole is of necessity small, vanishing at the ends, because electrons, whose movement So a monopole mounted over an ideal ground plane has a radiation pattern identical to a dipole antenna. RF-3192C-AT422 Rapid Deployable UHF Log Periodic Antenna Set. RF-3143TB-AT32X Tri-Band Vehicular Antenna. Current near the ends of the dipole is of necessity small, vanishing at the ends, because electrons, whose movement Monopole antenna also belongs to the linear antenna category. The balanced nature of the ideal circuit ensures that identical current will exist on each side of the dipole. The whip antenna is a monopole antenna, and like a vertical dipole has an omnidirectional radiation pattern, radiating equal radio power in all azimuthal directions (perpendicular to the antenna's axis), with the radiated power falling off with elevation angle to zero on the antenna's axis. Figure 7.1 illustrates operation of a basic half-wave resonant dipole antenna. The 7 meters is the total length of the dipole. 328 - WARC Tri-Band Antenna for 30m,17m,12m. The dipole, monopole, array, and large loop antenna types discussed below typically function as resonant antennas; with the monopole and its image forming a dipole, so the monopole antenna has a radiation pattern identical to the top half of the pattern of a similar dipole antenna. However, Adams For a dipole, this circuit is formed by the two wires and the capacitance between them. He found by experiment that if instead of the dipole, one side of the transmitter and Dipole Antenna: Monopole Antenna: This antenna belongs to the linear antenna category. 325 - Lazy-H Antenna for 20m,17m,15m,12,10m. Note that a perfect match occurs when the vertical is about 0.47 wave lengths tall. For example, a loop antenna is clearly a circuit. New features include additional modern material to make the text more exciting and relevant to practicing engineers; new chapters on systems, low-profile elements and base station antennas; organizational The one pictured below is for receiving ADS-B aircraft signals on 1090MHz, again using scrap copper, but this time a purchased N-Type chassis socket. However, Adams The one pictured below is for receiving ADS-B aircraft signals on 1090MHz, again using scrap copper, but this time a purchased N-Type chassis socket. A simple and intuitive technique for modeling this A monopole antenna needs a physical ground plane. A simple and intuitive technique for modeling this The balanced nature of the ideal circuit ensures that identical current will exist on each side of the dipole. 325 - Lazy-H Antenna for 20m,17m,15m,12,10m. This antenna simply uses a radiator to produce a synthetic ground plane in between the elements of a symmetric radiator. A monopole antenna is one half of a dipole antenna, almost always mounted above some sort of ground plane. Effective radiated power (ERP), synonymous with equivalent radiated power, is an IEEE standardized definition of directional radio frequency (RF) power, such as that emitted by a radio transmitter.It is the total power in watts that would have to be radiated by a half-wave dipole antenna to give the same radiation intensity (signal strength or power flux density in watts per The antenna consists of two metal rods connected to a receiver R.The electric field (E, green arrows) of the incoming wave pushes the electrons in the rods back and forth, charging the ends alternately positive (+) and negative ().Since the length of the antenna is one half the wavelength of the wave, the This antenna simply uses a radiator to produce a synthetic ground plane in between the elements of a symmetric radiator. Monopole antenna also belongs to the linear antenna category. Since a half-wave dipole has a radiation resistance of 73 ohms, a quarter-wave monopole will have a radiation resistance of about 36.8 ohms if it is mounted above a good ground plane. 3. The case of a monopole antenna of length L mounted above an infinite ground plane is shown in Figure 1(a).. A list of different antennas (antenna types) with links to detailed descriptions.