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In LEO satellite applications, a circularly polarized satellite antenna is desirable with a pattern that results in constant received power while the distance between the transmitter and the receiver is changing. A special type microstrip antenna satisfies these requirements along with their requirements for the satellite antenna. A complete theory, design, manufacture, test and evaluation processes of the microstrip patch antenna is discussed in this book. The book should be useful to professionals in antenna design. Especially the manufacture and test processes should help to new design engineers. Microstrip Patch Antenna for Leo Satellite Communications (Paperback)
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Microstrip is the name given to a type of open wave guide structure which is now commonly used in present day electronics not only as transmission lines but for circuit components such as filters, couplers, resonators etc. They have some well-known advantages such as small size, lightweight, low profile and low cost.This work had a broader scope of analysis, design, fabrication, testing and implementation of aperture coupled microstrip patch antenna array with omni-directional pattern. An aperture coupled microstrip antenna used aperture coupling and does not require a direct connection between the patch and the feed line. A small aperture in the ground plane located under the patch allows coupling from the feed line.The feed network requirement for the array to the required amplitude distributions has been addressed. Typically, these arrays of microstrip antennas are used to reduce overall ripple in the roll pattern of the antenna. This entire project has been carried out in LRDE, DRDO, Bangalore. Microstrip Patch Antenna Array with Omnidirectional Pattern (Paperback)
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Antennas are necessary and vital components of communication and radar systems, but sometimes their mobility to adjust to new operating scenarios can limit system performance. Reconfigurable antennas can adjust with changing system requirements or environmental conditions and provide additional levels of functionality that may result in wider instantaneous frequency bandwidths, more extensive scan volumes and radiation patterns with more desirable side lobe distributions. Their agility and diversity created new horizons for different types of applications especially in cognitive radio, Multiple Input Multiple Output Systems, satellites and many other applications. Reconfigurable antennas satisfy the requirements for increased functionality, such as direction finding, beam steering, radar, control and command, within a confined volume. Reconfigurable Compact Cross Patch Antenna for Switchable Polarization (Paperback)
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Note:Terminator is not included,you can purchase it separately,click here The Triple Feed Patch antenna is a directional circularly polarized antenna Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz. Good axial ratio, not just directly perpendicular to the patch but also off-center. Mini version with 45mm diameter :Click Here Radiation pattern: Measurements: Specifications: Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47 – 6.13 GHz) Matching: S11 \u003c -20 dB, VSWR \u003c 1.22 (at center frequency) Axial ratio: \u003c 1.3 Antenna gain: 9.4 dBi Half power beam width: 55° (horizontal and vertical) Radiation efficiency: 83.5% Diameter of large disk : 5.94cm Diameter of small disk: 2.46cm Features: Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz Good axial ratio, not just directly perpendicular to the patch but also off-center Note: The PCBs must use 1.0 mm thickness FR4 material Package included: 1 x Realacc Triple Feed Patch-1 5.8GHz 9.4dBi Directional Circular Polarized FPV Antenna 1 x Extended cable 1 x SMA Feamale to RP-SMA Male adapter connector , , , , , , , , , ,
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Note:Terminator is not included,you can purchase it separately,click here The Triple Feed Patch antenna is a directional circularly polarized antenna Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz. Good axial ratio, not just directly perpendicular to the patch but also off-center. Mini version with 45mm diameter :Click Here Radiation pattern: Measurements: Specifications: Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47 – 6.13 GHz) Matching: S11 \u003c -20 dB, VSWR \u003c 1.22 (at center frequency) Axial ratio: \u003c 1.3 Antenna gain: 9.4 dBi Half power beam width: 55° (horizontal and vertical) Radiation efficiency: 83.5% Diameter of large disk : 5.94cm Diameter of small disk: 2.46cm Features: Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz Good axial ratio, not just directly perpendicular to the patch but also off-center Note: The PCBs must use 1.0 mm thickness FR4 material Package included: 1 x Realacc Triple Feed Patch-1 5.8GHz 9.4dBi Directional Circular Polarized FPV Antenna 1 x Extended cable 1 x SMA Feamale to RP-SMA Male adapter connector , , , , , , , , , ,
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Note:Terminator is not included,you can purchase it separately,click here The Triple Feed Patch antenna is a directional circularly polarized antenna Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz. Good axial ratio, not just directly perpendicular to the patch but also off-center. Mini version with 45mm diameter :Click Here Radiation pattern: Measurements: Specifications: Center frequency: 5.8 GHz Bandwidth: 660 MHz (5.47 – 6.13 GHz) Matching: S11 \u003c -20 dB, VSWR \u003c 1.22 (at center frequency) Axial ratio: \u003c 1.3 Antenna gain: 9.4 dBi Half power beam width: 55° (horizontal and vertical) Radiation efficiency: 83.5% Diameter of large disk : 5.94cm Diameter of small disk: 2.46cm Features: Good radiation efficiency. Most FR4-based patches have terrible efficiency because FR4 is very lossy at 5.8 GHz Good axial ratio, not just directly perpendicular to the patch but also off-center Note: The PCBs must use 1.0 mm thickness FR4 material Package included: 1 x Realacc Triple Feed Patch-1 5.8GHz 9.4dBi Directional Circular Polarized FPV Antenna 1 x Extended cable 1 x SMA Feamale to RP-SMA Male adapter connector , , , , , , , , , ,
