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[IEEE 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - Bangalore, India (2018.9.19-2018.9.22)] 2018 International Conference on Advances in Computing, Communications and Informatics (ICACCI) - High Performance Dual Circularly Polarized Microstrip Patch Antenna for Satellite Communication
摘要： High performance dual circularly polarized X-band microstrip patch antenna for satellite communication is presented in this paper. The high performance refers to high return loss, high isolation, high gain >8.5dBi and low cross polarization with axial ratio<2dB throughout the bandwidth 8–8.4GHz. This performance is achieved by using stacked substrate with square patch on the top layer and a 90? hybrid coupler on the bottom layer. The patch is electromagnetically coupled through the two apertures present on the ground plane which is fed by the branchline coupler present on the bottom substrate. Simulated and measured results shows that this basic element can be extended to form a phased array antenna due to its less weight,compact structure and high performance.
关键词： dual circular polarization,broadband antenna,low cross polarization,high isolation,Aperture coupled antenna
更新于2025-09-23 15:23:52
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Design and Characterization of Wideband Aperture-Coupled Circularly Polarized Antenna for Gigabits Per Second Wireless Communication System
摘要： In this paper, design and characterization of an aperture-coupled circularly polarized (CP) rectangular patch antenna suitable for Gigabit per second wireless communications system is presented. The proposed antenna exhibits a large bandwidth of 2.77 GHz at centre frequency fc = 19.5 GHz (about 15% of fractional bandwidth (FBW)). It also has a gain of about 7.25 dBi at 18 GHz with good stable gain and radiation characteristics in the frequency band of interest. For indoor wireless channel measurements, two developed prototypes are employed as single input single output transmit receive (TX–RX) antennas with a robust and versatile channel modeling system. We demonstrate a measurement campaign to investigate the dynamic range of the system by calculating path loss. The pulse dispersion effect is quantified by pulse fidelity factor (PFF). The measurements are performed in laboratory environment using Gaussian pulse based sounding signal modulated at 19.3 GHz carrier frequency. The design and characterization of compact size antennas with pertinent bandwidth and excellent radiation characteristics is one of our initiatives towards developing a millimeter wave (MMW) test bed system for channel modeling and measurement, since 5G wireless communication is supposed to operate in MMW band.
关键词： Aperture-coupled antenna,Gigabits per second wireless system,Circularly polarized antenna
更新于2025-09-23 15:19:57
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A Linear-to-Circular Polarization Conversion Metasurface Based Wideband Aperture Coupled Antenna
摘要： This paper proposes an aperture-coupled antenna with an ultrathin, single-layer metasurface for linear-to-circular (LP–CP) polarization conversion. The unit cell of the metasurface consists of a hexagonal ring surrounded by a square ring printed on both sides of a dielectric substrate for wideband LP-CP conversion. A patch antenna excited by an H-shaped slot aperture uses a 5 × 5 array of the metasurface as a superstrate. Simulated and measured radiation patterns of the proposed antenna are in good agreement. Measured S11 and axial ratio bandwidth of the proposed antenna are 21.5% and 19.23% respectively. Boresight radiation gain is around 10 dBic over 9.5 GHz to 11.5 GHz.
关键词： Circular polarization,Polarization conversion,Metasurface,Aperture coupled antenna,Wideband
更新于2025-09-23 15:19:57