A Dual-Band High-Gain Resonant Cavity Antenna With Orthogonal Polarizations

Abstract

In this letter, a new study on the theory and the design of a dual-band dual-polarized high-gain resonant cavity antenna (RCA) is presented. The RCA includes two layers of orthogonal dipole arrays each located at a designated height above the ground plane of a microstrip patch antenna. A prototype is fabricated, and the measured results confirm the theory. The measured prototype has a lower-band gain of 19.6 dBi with the vertical polarization (V-pol) at 10 GHz and the upper band gain of 18 dBi with horizontal polarization (H-pol) at 11.6 GHz. The cross polarization (Xpol) is better than 27 dB at each band. It is demonstrated that the separation between the two bands is controlled arbitrarily.

High gain planar resonant cavity antennas based on metamaterial and frequency selective surfaces

“…• Dual band RCA: By using single layer single sided superstrate exhibiting change of the gradient of reflection phase with respect to frequency around the resonance frequency of FSS, from a small negative value to positive value [42]. • Dual band dual polarized RCA: By using dual layer FSS superstrate [43] or single sided slotted FSS [44]. • Dual band sectoral RCA: By using metallic EBG materials as a superstrate with frequency selective surfaces (FSS) as a substrate [45].…”

High gain dual band slot antenna loaded with frequency selective surface for WLAN/fixed wireless communication

“…Gain enhancement with dual band operation, using artificial magnetic conductor as the ground plane was used in extant literature instead of a metal ground plane; but this, increased the antenna's complexity . Another complex method for designing dual‐band resonant cavity antennas (RCAs) was to use a double‐layer FSS superstrate as the reflective layer, with double‐layer of the same printed dipoles was introduced as the PRS to enhance the gain of a microstrip patch antenna at two bands with orthogonal linear polarizations …”

“…6 Another complex method for designing dual-band resonant cavity antennas (RCAs) was to use a double-layer FSS superstrate as the reflective layer, with double-layer of the same printed dipoles was introduced as the PRS to enhance the gain of a microstrip patch antenna at two bands with orthogonal linear polarizations. 7 This gain enhancement was due to the employment of Ray-tracing technique 8 of multiple reflections from highly reflective layer to the grounded plane below the antenna structure, as shown in Figure 1, wherein the array of unit cell redirects electromagnetic waves, exhibiting thereby numerous echoes in a cavity; the waves then leak out through the FSS layer. Thus, highly reflective FSS screen like capacitive FSS, inductive FSS, metallic patches, dumbbell, Jerusalem 9 of various shapes and sizes are placed on the antenna to obtain high gain RCA.…”

Array‐fed dual‐polarized wideband fabry–perot antenna based on metasurface

“…In , two patch antennas operating for two orthogonal polarizations were employed as the primary source. A dual‐band dual‐polarized FP antenna was reported in , where a two‐layer PRS was applied. However, these dual‐polarized FP antennas suffered from narrow bandwidth.…”