Ferrite ring loaded hybrid substrate design for gain enhancement of linearly and circularly polarized microstrip antennas

2019 ◽  
Vol 29 (12) ◽  
Author(s):  
Elizabeth George ◽  
Chinmoy Saha
Keyword(s):  
Microstrip Antennas ◽  
Circularly Polarized ◽  
Gain Enhancement ◽  
Ferrite Ring

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

scholarly journals A Circularly Polarized Antenna Array with Gain Enhancement for Long-Range UHF RFID Systems

Electronics ◽  
2019 ◽  
Vol 8 (4) ◽  
pp. 400 ◽  
Author(s):  
Wei Hu ◽  
Guangjun Wen ◽  
Daniele Inserra ◽  
Yongjun Huang ◽  
Jian Li ◽  
...  
Keyword(s):  
Antenna Array ◽  
Long Range ◽  
Radio Frequency Identification ◽  
Coaxial Line ◽  
Axial Ratio ◽  
High Gain ◽  
Basic Element ◽  
Uhf Rfid ◽  
Circularly Polarized ◽  
Gain Enhancement

A 2 × 2 circularly polarized (CP) sequential rotation microstrip patch antenna array with high gain for long-range ultra-high frequency (UHF) radio frequency identification (RFID) communication is proposed in this paper. In order to meet the operational frequency band requirement of 840–960 MHz and, at the same time, achieve enhanced broadside gain, a two-level sequential rotation structure is developed. Series power divider is used as the basic element of the feed network that is implemented with the substrate-integrated coaxial line technology for minimizing radiation losses. The manufactured prototype exhibits a peak gain of 12.5 dBic at 900 MHz and an axial ratio (AR) bandwidth (AR ≤ 3 dB) of 18.2% from 828 to 994 MHz. In comparison with the state-of-the-art, the proposed antenna shows an excellent gain/size trade-off.

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