High gain circularly polarized slot‐coupled antenna for millimeter wave applications

Abstract

A high gain circularly polarized millimeter-wave x-slot antenna with surface mounted horn is presented. Substrate integrated waveguide technology is adopted to achieve low profile feeding structure to excite the x-shaped slot backed by a circular cavity. As a gain enhancing technique, a surface mounted horn, made from a very thin copper sheet is placed over the x-slot to achieve a realized gain more than 15 dB. The proposed design exhibits an experimental bandwidth of 1.05 GHz. A very good agreement between the experimental and the simulated results is achieved.

Compact Coaxial Probe-Fed Cp Substrate Integrated Waveguide Cavity-Backed Antenna Utilizing Slot Split Ring

“…It can be seen that the proposed antenna has the advantages of compact size, wide impedance matching bandwidth and AR bandwidth, easy integration with planar circuits due to the flexible feed structure. Moreover, compared to [11], the proposed antenna has a wider operation bandwidth and 80.8% smaller planar size. …”

“…In [10], by exiting two orthogonal resonant modes of an SIW resonator with four radiating slots, a CP SIW slot antenna with high gain was designed. Crossed slot structures were also adopted to achieve the CP radiation characteristic [11][12][13]. In [12], the gain of a CP x-slot antenna was enhanced by adding a surface mounted horn.…”

A Novel Small Size CPW-Fed Slot Antenna With Circular Polarization for 5g Application

“…It seems that the best candidate is Printed CPW-fed slot monopole antenna due to its low profile, low radiation loss, wide impedance bandwidth, no soldering points for printing on the circuit board of the portable devices, and easy fabrication with low cost [10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27].…”

Novel Circularly Polarized Siw Cavity-Backed Antenna With Wide Cp Beamwidth by Using Dual Orthogonal Slot Split Rings

“…To overcome these shortcomings, many substrate integrated waveguide (SIW) cavitybacked CP slot antennas have been proposed. The following three main radiating configurations of CP SIW cavity-backed slot antennas have been proposed in the literature: compound slots [5][6][7][8][9], annular, triangular or split ring slot [10][11][12][13] and patches, loop or cavity that cover the slots [14][15][16][17][18][19].…”

“…The cross-slots are similar to the compound orthogonal straight slot pair and can also realize the circular polarization [7,8]. A circularly polarized radiating element consisting of four slots has been reported in [9], which can be considered a combination of the orthogonal slot pair.…”