Polarization-Reconfigurable Antenna Array for Millimeter-Wave 5G

Abstract

The design of 5G 4-element antenna array system with the capability of switching its operation between right hand circular polarization (RHCP) and left hand circular polarization (LHCP) is proposed. The CP-reconfigurability is achieved by electronically switching two PIN-diode pairs in the feeding circuit, which consists of a branch line coupler and two feeding arms. The proposed configuration reduces the number of tuning elements and allows the use of imperfect PIN diodes at millimeter-wave frequency. The fabricated prototype exhibits a 3-dB axial ratio bandwidth from 27.2 to 28.35 GHz. A maximum measured gain of about 6 dBic and a radiation efficiency of around 51% over the bandwidth are achieved for both CP states. INDEX TERMS Branch-line coupler, circularly polarized, patch antenna array, polarization-reconfigurable, 5G.

Wideband Reconfigurable Millimeter-Wave Linear Array Antenna Using Liquid Crystal for 5G Networks

“…The variations of the return loss (S 11 ) parameters of the proposed reconfigurable antenna array using GT3-23001 LC by varying the bias voltage are plotted in The results plotted in Figure 12 and Figure 13 present the radiation efficiency and the total efficiency of the linear reconfigurable antenna array respectively for dBi and a radiation efficiency of around 51% over the bandwidth [30]. [22] [33] has a relatively large size, with a dimension of the single element patch antenna of 26 × 24 mm 2 and an overall array size of (110 × 110) mm 2 for [22], whereas the dimensions of [33] are (304 × 1.7) mm 2 .…”

A mode‐combination‐based polarization‐reconfigurable antenna

“…[1][2][3][4] Most of the reported polarization-reconfigurable antennas can be switched among different polarization states by utilizing PIN diodes or RF-MEMS switches to different parts of the antenna system. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] One effective technique is to use a reconfigurable feeding network to feed different parts of the antenna. [6][7][8][9][10][11][12][13][14][15] Another approach is directly to introduce controllable perturbation segments on the radiating part of the antenna.…”

Polarization-Reconfigurable Antenna Using Combination of Circular Polarized Modes

“…Several schemes have been proposed to switch the polarization states of an antenna (or antenna array), where electrical control components such as PIN diodes or RF-MEMS are usually employed [6]- [20]. An antenna can be switched between various polarization states by using reconfigurable feeding network to feed different parts of the antenna [6]- [15].…”

“…Several schemes have been proposed to switch the polarization states of an antenna (or antenna array), where electrical control components such as PIN diodes or RF-MEMS are usually employed [6]- [20]. An antenna can be switched between various polarization states by using reconfigurable feeding network to feed different parts of the antenna [6]- [15]. Meanwhile, electrical control components can also be directly used to introduce perturbation segments on the radiating part of the antenna, thus leading to different polarization states [16]- [24].…”