Low Cross-Polarization Improved-Gain Rectangular Patch Antenna

Abstract

In this paper, a low cross-polarization improved-gain rectangular patch antenna is presented. A patch-ground shorting pin with defected patch structure (DPS) is introduced to suppress the cross-polarization level. A High Reflective Frequency Selective Surface (HRFSS) superstrate is designed and placed over the proposed antenna at an optimized position to intensify the gain. To characterize the unit-cell of the superstrate, its transmission characteristics are extracted and discussed. Integration of the superstrate achieves a beam contraction resulting in a gain enhancement to 10.65 dBi. The proposed antenna has perfect broadside radiation with a cross-polarization level of below −30 dB in the entire half power beamwidth. The prototype of the antenna exhibits good agreement between experimental and simulated results.

Cantor-square Fractal Reconfigurable Circular Patch Antenna with Low Cross-polarization for X Band Applications

“…A comparative analysis of the proposed work with some existing works [19][20][21][22] based on the technique used for cross-polarization reduction is as reported in Table 5. The proposed design not only is reconfigurable but also has a reduced cross polarization level by incorporating a simple technique of fractal ground.…”

“…Technique used for cross-polarization reduction Cross polarization level (dB) [19] Shorted Defected Patch Structure (DPS) −30 [20] Differential feed < −45 [21] Differential feed −32 [22] 180 deg Broadband microstrip balun < −20 Proposed work Fractal ground < −63…”

“…One of the most undesirable features in microstrip antennas is cross polarization which is orthogonal to the desired polarization. Higher cross-polarization is a critical limitation that can often lead to cross-talk in communication systems [19]. A novel aspect to reduce cross polarization using differential feeding in patch antenna array has been presented in [20].…”

Printed Dual‐Frequency Directional Antenna Loaded With Dual‐Parasitic Strip

“…These weaknesses are likely to disturb the accuracy of the sensor when they are applied to the free‐space technique. Among the developed techniques, gain enhancement and cross‐polarization reduction could also be realized by utilizing the substrate‐integrated meandering probe (Zhao & Lin, 2016), the filtering technique (Zhang et al., 2019), and the metamaterial‐based technique (Singh et al., 2019). However, these antennas also suffer from sandwich construction and complex fabrication which pose problems during the manufacturing process.…”