Circularly polarized defected ground stub‐matched triple‐band microstrip antenna for C‐ and X‐band applications

Abstract

This article embodies the design and analysis of a novel triple‐band single‐fed circularly polarized (CP) antenna for C‐ and X‐band applications. The proposed antenna covers downlink frequency of C band (3.7‐4.2 GHz) and X band (7.25‐7.3 GHz) for satellite applications. The antenna radiator comprises of F‐shape radiating patch with 50 Ω microstrip feed line. The square strips, slit, and rectangular stub/perturbation are used on the ground plane for achieving the three CP bands. The proposed antenna has −10 dB impedance bandwidth of 50.6% (3.46‐5.71 GHz), 11.8% (6.88‐7.73 GHz), 5.02% (10.84‐11.40 GHz), and 3‐dB axial ratio bandwidth of 11.4% (4.67‐5.24 GHz), 3.02% (7.17‐7.39 GHz), and 10.16% (10.84‐11.15 GHz). The peak gain across the axial ratio bands (4.67‐5.24 GHz, 7.17‐7.39 GHz, and 10.84‐11.15 GHz) are 6.23, 2.07, and 2.11 dBi observed, respectively. The antenna is designed on FR4‐epoxy substrate with an overall volume of (0.53λ0 × 0.53λ0 × 0.02λ0 mm3) at a design frequency of 5 GHz. The simulated and measured results of the proposed antenna have been validated and minor deviation (2.2%, 0.13%, and 0.02% at center frequencies of 4.6, 7.31, and 11.12 GHz, respectively) between simulated and measured results has been observed.

Broadband Circular Polarised Printed Antennas for Indoor Wireless Communication Systems: A Comprehensive Review

“…However, as revealed in Table 2 , the trade-off factors (IBW/size) and (ARBW/size) with values of 3.43 and 3.09, respectively, are still relatively low because the bands of the proposed antenna are centred at a high frequency of 5.15 GHz. The technical specification and working principle of this antenna have been studied widely in the literature [ 92 , 93 , 94 , 95 ]. Recently, two research works proposed slot antennas with different structural geometries based on radiator patch and ground plane shapes.…”

Bat Shaped Circularly Polarized Antenna for X and Ku Band Applications

“…Different patch shapes of antenna like C shape, split ring, parasitic patches, and strips are reported to obtain circular polarization [14][15][16][17]. Antennas with dual bands [18,19], triple bands [20][21][22][23], and multibands [24][25][26] are reported for different applications. Circularly polarized antenna is useful for lowering the multipath interferences, polarization loss, and limited bandwidth.…”

A Miniaturized Multi-Band Antenna Operating in C, X, and Ku Bands

“…An antenna radiator using F-shape radiated patch that is fed by a microstrip line is designed. Using the square strips and rectangular stub that is positioned in the ground achieved three bands with circular polarization-this covered frequency of the C band and X band destined for satellite applications [11]. A quad-band antenna is presented for sub 6 GHz-5 G applications [12].…”