X-band circularly polarized antenna gain enhancement with metamaterials

2011 ◽  
Vol 53 (8) ◽  
pp. 1911-1915 ◽  
Author(s):  
C. Kossiavas ◽  
A. Zeitler ◽  
G. Clementi ◽  
C. Migliaccio ◽  
R. Staraj ◽  
...  
Keyword(s):  
Antenna Gain ◽  
Circularly Polarized ◽  
Gain Enhancement ◽  
X Band

scholarly journals Design of CPW fed f-shaped circularly polarized antenna for amateur radio vehicular communications

2017 ◽  
Vol 7 (1.1) ◽  
pp. 360
Author(s):  
T V. Ramakrishna ◽  
B T.P. Madhav ◽  
D Amulya ◽  
S Sumitra ◽  
A Sai Kumar ◽  
...  
Keyword(s):  
Coplanar Waveguide ◽  
Axial Ratio ◽  
Maximum Efficiency ◽  
Band Spectrum ◽  
Antenna Gain ◽  
Vehicular Communications ◽  
Circularly Polarized ◽  
Amateur Radio ◽  
X Band ◽  
Rectangular Strips

In this paper a compact circularly polarized antenna is proposed to operate in X-band spectrum. The F-shaped monopole element is used as the radiating structure and the closed coplanar-waveguide ground is used on a FR4 substrate. The proposed feeding mechanism with asymmetric ground planes and the three rectangular strips connected to the feed line. The proposed antenna operates with a -10dB reflection coefficient bandwidth from 9.3 GHz to 13 GHz and the circular polarized performance is attained from 9.8 GHz – 11.2 GHz with axial ratio less than 3dB (AR < 3dB). The antenna gain in the boresight direction is found to be achieved as 4.34dB and radiates with a maximum efficiency of 90% which is suited for amateur radio applications in X-band spectrum based vehicular communications.

scholarly journals Axial Ratio and Gain Enhancement of a Circular-Ring Slot Antenna Using a Pair of Asymmetrical Rectangular Slots and a Parasitic Patch for a Radio Beacon on a Nanosatellite

Aerospace ◽  
2019 ◽  
Vol 6 (4) ◽  
pp. 39 ◽  
Author(s):  
Peberlin Parulian Sitompul ◽  
Josaphat Tetuko Sri Sumantyo ◽  
Farohaji Kurniawan ◽  
Mohammad Nasucha
Keyword(s):  
Axial Ratio ◽  
Slot Antenna ◽  
Impedance Bandwidth ◽  
Electron Content ◽  
Antenna Gain ◽  
Total Electron ◽  
Circularly Polarized ◽  
Gain Enhancement ◽  
Compact Size ◽  
Parasitic Patch

Radio beacons enable measurements of ionospheric radio scintillations and total electron content (TEC). These beacons transmit unmodulated, phase-coherent waves in S-band frequencies. Many satellite applications require circularly polarized (CP) wideband antennas. Their compact size, lightweight, and simple fabrication method make CP antennas suitable for small satellite systems. The slot antenna has wideband impedance, but the 3 dB axial ratio bandwidth (ARBW) is narrower compared to the impedance bandwidth (IBW). In this paper, a circularly polarized circular-slotted antenna (CSA) is proposed to enhance the ARBW and the antenna gain. A pair of asymmetrical rectangular slots, a simple 50 Ω feedline and a parasitic patch were introduced to a CSA to enhance the 3 dB ARBW and the antenna gain. Rectangular slots were inserted on the diagonal axis of the CSA, the feedline was shifted to the left side of the x-axis, and a parasitic patch was attached to the circular slot. The lengths of the rectangular slots correspond to the resonant frequency, and the parasitic patch width corresponds to the higher frequency of the 3 dB ARBW. The asymmetrical rectangular slots, the shifted feedline, and the parasitic patch successfully improved the measured 3 dB ARBW of the antenna by 787.5 MHz or 35.79%. The measured gain of a CSA with left-hand circular polarization (LHCP) was also improved by shifting the feedline and the rectangular slot, achieving a peak gain of 5 dBic.

Erratum for: Analysis of antenna gain enhancement using new frequency selective surface superstate

2016 ◽  
Vol 58 (7) ◽  
pp. 1774-1774
Author(s):  
Moufida Bouslama ◽  
Moubarek Traii ◽  
Ali Gharsallah ◽  
Tayeb Ahmed Denidni
Keyword(s):  
Frequency Selective Surface ◽  
Antenna Gain ◽  
Gain Enhancement ◽  
Frequency Selective

A novel design of circularly polarized ring CDRA with wideband impedance bandwidth using slotted microstrip feed line for X-band applications

2021 ◽  
pp. 1-10
Author(s):  
Chandravilash Rai ◽  
Sanjai Singh ◽  
Ashutosh Kumar Singh ◽  
Ramesh Kumar Verma
Keyword(s):  
Axial Ratio ◽  
Impedance Bandwidth ◽  
Dielectric Resonator Antenna ◽  
Circularly Polarized ◽  
Feed Line ◽  
X Band ◽  
Novel Design ◽  
Two Hybrid ◽  
Microstrip Feed Line ◽  
Microstrip Feed

Abstract A circularly polarized ring cylindrical dielectric resonator antenna (ring-CDRA) of wideband impedance bandwidth is presented in this article. The proposed ring CDRA consist of an inverted rectangular (tilted rectangular) shaped aperture and inverted L-shaped slotted microstrip feed line. The tilted rectangular shaped aperture and inverted L-shaped microstrip feed line generate two-hybrid mode HEM11δ and HEM12δ while ring CDRA and slotted microstrip feed line are used for the enhancement of impedance bandwidth. The proposed ring CDRA is resonating between 6.08 and 12.2 GHz with 66.95% (6120 MHz) impedance bandwidth. The axial ratio (AR) bandwidth of 6.99% (780 MHz) is obtained between 10.76 and 11.54 GHz with a minimum AR value of 0.2 dB at a frequency of 11 GHz. The proposed geometry of ring CDRA has been validated with measurement performed by VNA and anechoic chamber. The operating range of the proposed radiator is useful for different applications in X-band.

scholarly journals A DETACHED ZERO INDEX METAMATERIAL LENS FOR ANTENNA GAIN ENHANCEMENT

2012 ◽  
Vol 132 ◽  
pp. 463-478 ◽  
Author(s):  
Fan-Yi Meng ◽  
Yue-Long Li ◽  
Kuang Zhang ◽  
Qun Wu ◽  
Joshua Le-Wei Li
Keyword(s):  
Antenna Gain ◽  
Gain Enhancement ◽  
Zero Index

scholarly journals A Circularly Polarized Semi-Symmetric Curvature Slot Fractal Antenna for Gain Enhancement

2021 ◽  
Vol 14 (3) ◽  
pp. 116-123
Author(s):  
Bandhakavi. S. Deepak ◽  
Boddapati. T. P. Madhav ◽  
Badisa Anil Babu ◽  
Kosuru Sri Rama Murthy
Keyword(s):  
Fractal Antenna ◽  
Circularly Polarized ◽  
Gain Enhancement
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