Analysis of single shorted square microstrip antenna

Deshmukh, Amit A.; Pawar, Shefali; Kadam, Poonam; Odhekar, Anuja A.; Ray, K. P.

doi:10.1109/etiict.2017.7977022

Cited by 2 publications

(2 citation statements)

References 13 publications

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“…The patch centre has zero potential for the fundamental mode, which implies that by loading a shorting post at the centre of the patch, cannot change the fundamental mode frequency. Moreover, if the patch shorted at the centre, it originates another lower order mode which has a resonant frequency equal to FL [10]- [14]. This lower order mode frequency FL obtained due to quarter-wavelength, which includes the most considerable distance from the shorting post position to the diagonally opposite open end on the edge of an HMSA.…”

Section: Analysis Of An Inset Fed Hmsamentioning

confidence: 99%

“…Rectangular and Circular MSAs have been designed with simple MS-line feed (without an inset), which have reduced cross-polarization [9]- [13]. Also, detailed investigation of various resonant modes generated in a shorted MS-line fed square MSA has been reported in [14]. Recently, new configurations of probe-fed MSAs was reported [15], [16].…”

Section: A 50ω Microstrip Line Fed Shorted Hexagonal Microstrip Antenmentioning

confidence: 99%

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A 50Ω Microstrip Line Fed Shorted Hexagonal Microstrip Antennas with Reduced Cross-Polarization

Rathod¹,

Awale²,

Ray

2019

J. Microw. Optoelectron. Electromagn. Appl.

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A Hexagonal Microstrip Antenna (HMSA) is an approximation to a Circular MSA (CMSA), which is not symmetrical over two principal planes, unlike a CMSA. Consequently, two types of feed positions are feasible for each X and Y-axes. When a quarter-wave transformer or inset feed is used to match the edge impedance of the HMSA, it becomes asymmetrical over the feed axis (E-plane), which leads to increase in the crosspolarization level in the H-plane. In this paper, to reduce the crosspolarization level of HMSA along H-plane and to match the edge impedance of the HMSA on each X and Y-axes with the 50Ω-Microstrip (MS)-line-feed, a single and a pair of shorting posts have been used. The current distribution of the shorted HMSA is changed due to the loading of shorting posts into the patch, which in-turns help to match the edge input impedance. A detailed investigation on the characteristics of the shorted HMSA with modified fundamental mode frequencies has been presented. The co-polarization to crosspolarization ratios (CTCR) in H-plane of the HMSA with a pair of shorting posts has been reduced substantially by more than 20 dB at the broadsight direction in comparison with that of an HMSA with a single shorting post or with an inset. The simulated results of the HMSA with direct 50Ω-MS-line-feed are in good agreement with measured ones.

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Section: Analysis Of An Inset Fed Hmsamentioning

confidence: 99%