A miniaturized wideband dual-polarized antenna for base-station applications

A Low-frequency Compact Lightweight Dual-polarization CATR Feed Antenna

“…Cross-dipole antennas offer wideband performance and have a uniform radiation pattern. [10,11] introduced triangular and circular ring dipole structures that help reduce the axial length of low-frequency feed sources. However, these antennas have low radiation efficiency, and their antenna gain is not ideal.…”

A broadband dual‐polarized antenna with irregular polygon patches and trapezoidal coupling plates

“…A common way is to use microstrip antennas because of orthogonal resonance modes (TM01 and TM10) on plates that easily provide ports isolation and cross polarization discrimination (XPD). [1][2][3][4][5][6][7][8][9][10][11][12][14][15][16][17][18][19][20][21][22][23][24][25][26][27] The magneto-electric dipoles (MED) technique, dipoles consisting of an electric pole and a magnetic pole that cause to expand bandwidth, radiation patterns stability, high gain, and low cross polarization. 1,[5][6][7][8]12,13,15,17 Multilayer PCB technique, in this way new frequency bands are created by stimulating resonant modes on the plates, thereby the antenna bandwidth is extended as adjacent multiband.…”

“…2,4,5,7 Coupling techniques, different coupling methods such as L, T, Y, loop, are used in the design of broadband dipole antennas that matching the coupling element to the dipole plates has a direct effect on the coupling value. [2][3][4][5][7][8][9][10][11][12][13][14][15] The non-PCB techniques, these types of antennas are made only of metal sheets with slit that have high power tolerance and mostly used for large area radio coverage. [18][19][20] Cavity reflector techniques, in this method a variety of cavity reflectors are used to improve the antenna gain, directivity, and ratio of front-toback lobes.…”

“…25 The AE45 cross dual-polarized antennas techniques used to reduce multipath fading and increase channel capacity, usually replace to the space diversity systems and occupy a little space. [1][2][3][4][5][6][9][10][11][12][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28] Methods of feeding dual-polarized antennas such as direct probe (coaxial cable), side coupling (horizontal and vertical), and feeding by balun (printed and nonprinted) that use balun cause high loss, low efficiency, and complexity of structure. [20][21][22][23][24][25][26] In this article, a dual-polarized antenna is presented in which irregular polygon patches and trapezoidal plates are printed on both sides of the substrate at a AE45 angle and a box-shaped reflector is embedded in the back of the substrate.…”