Ultralow-Power Radio Frequency Beamformer Using Transmission-Line Transformers and Tunable Passives

被引：4

作者：

Anderson, Matthew Giorgis ^{[1
]}

Thielens, Arno ^{[1
,2
]}

Wielandt, Stijn ^{[1
,3
]}

Niknejad, Ali ^{[1
]}

Rabaey, Jan ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Elect Engn & Comp Sci, Berkeley, CA 94720 USA

[2] Univ Ghent, IMEC, Waves Res Grp, Dept Informat Technol, B-9052 Ghent, Belgium

[3] Katholieke Univ Leuven, DRAMCO, Dept Elect Engn ESAT, Ghent Technol Campus, B-9000 Ghent, Belgium

来源：

IEEE MICROWAVE AND WIRELESS COMPONENTS LETTERS | 2019年 / 29卷 / 02期

基金：

欧盟地平线“2020”;

关键词：

Antenna array; beam steering; phase shifter; phased array; series connected antennas; series phased array;

D O I：

10.1109/LMWC.2018.2886628

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

A simple, low-loss technique for radio frequency (RF) beamforming is realized by serially combining the antennas in an array using transmission-line transformers (without magnetic components) incorporated into the feed line and a programmable admittance placed in shunt across each antenna's feed port. Utilizing the feed structure for signal combining eliminates the need for additional RF combining structures. Furthermore, taking advantage of the symmetry inherent in a phased array, we propose a new method for passive phase shifting that only requires one tunable element per antenna. The beamformer, which requires zero active power, is demonstrated on an FR4 printed circuit board with a linear, two-element, array of half-wave dipoles at 2.05 GHz using a digitally tunable capacitor as the programmable admittance. A loss in array gain of 1.07 dB is realized when compared to an identical array with ideal phase combining.

引用

页码：158 / 160

页数：3