Single‐layer low‐profile wideband circularly polarized patch antenna surrounded by periodic metallic plates

Abstract

This article presents a simple design of circularly polarized (CP) antenna with low profile and wideband operation characteristics. To achieve these desirable features, a truncated corner squared patch is chosen as primary radiating source and surrounded by periodic metallic plates for bandwidth enhancement. Notably, all the radiating elements are designed on a single layer of substrate using printed circuit techniques, which significantly reduces the design complexity. The final prototype with overall size of 0.60λo × 0.60λo × 0.05λo (λo is free‐space wavelength at the center operating frequency) was fabricated and tested. Measured results show that the proposed antenna has wide operation bandwidth of 19.7% (5.1‐6.2 GHz). Additionally, broadside gain ranging from 5.0 to 6.9 dBic is also attained within the operating band. In comparison with the other reported antennas in literature, the proposed one has the simplest design architecture with competitive operating bandwidth.

A circularly polarized patch antenna with a slotted parasitic loop

“…Radiators are slotted or cut corners to realize the CP radiation characteristics in the CP patch antennas, [1][2][3][4][5][6] but their 3-dB axial-ratio bandwidths (ARBW) are narrow. The combination of slot and chamfer is a more effective method to achieve CP radiation, L-slots and chamfer were used by the stacked CP patch antenna, 7 while square slots and chamfer were combined in Ref.…”

A wideband circularly polarized patch antenna based on TM 31 mode and slot mode

“…The available bandwidth is no more than 20% under the specification of VSWR <2, AR <3 dB, and gain variation <3 dB for single-port antennas. [7][8][9] Thence, the multi-port feed mechanism is developed in order to obtain greater CP bandwidth. [10][11][12][13][14][15][16][17][18] The spatial location and excitation phase of each port need to be carefully considered.…”

A compact circular polarized patch fractal antenna for global navigation satellite systems

“…6 A single fractal antenna fed by a microstrip is small in size but high in working frequency, which cannot meet the needs. 7 In Tran et al, 8 a CP antenna with a single feed was proposed, which used a periodic structure to solve the problem of narrow antenna bandwidth caused by the single feed, which is enlightening. A resonator antenna with the fractal structure of Sierpinski carpet arranged on the patch was proposed in Mukherjee et al, 9 by using the fractal structure, the bandwidth is expanded and the gain is improved, 10 which is innovative.…”