Generalized Principle of Pattern Multiplication and Its Applications
Junping Geng, Chaofan Ren, Kun Wang, Erwei Liu, Jing Zhang
gengjunp@sjtu.edu.cn
ISBN 978-981-19-3558-9
Springer Press
Phased array antennas are easy to achieve beam control and fast scanning, and have a wide range of applications in radar, communications and other fields. As people’s requirements for radar and communication detection and transmission continue to increase, correspondingly, higher requirements are placed on the performance of phased arrays. High-gain wide-angle scanning is a key performance bottleneck that urgently needs to be broken for phased arrays. The fixed element pattern in the traditional phased array has little or no contribution to the large-angle scanning beam gain. When the beam is directed at a large angle, the equivalent spacing between the array elements becomes smaller and the coupling between the array elements increases, which limits the scanning range of the array. In order to broaden the scanning range of the array, a wide-beam antenna unit is usually applied to the array. However, the wide-beam antenna unit has the disadvantage of low gain, which makes the array must sacrifice part of the gain to achieve the wide-angle coverage. This book studies the high gain and wide-angle scanning array, and the main results are as follows:
1: This book proposed the generalized element factor, and the generalized principle of the pattern multiplication is proposed based on the generalized element factor. Then the array designed based on generalized principle of the pattern multiplication can simultaneously achieve high gain and wide-angle scanning is proved theoretically, which greatly improves array performance.
2: This book designs a dual-port phase mode antenna element. The element’s operating mode changes as the phase difference between the two ports changes, the pattern changes meanwhile. The simulated power flow distribution and pattern also verify multi-mode characteristics of the antenna. The experimental results are basically consistent with the simulation. The propose phase mode antenna is used as an example of the generalized element factor (GEF) in the generalized pattern multiplication. On this basis, the phase mode antenna element is expanded into a 1*4 one-dimensional array to expand the scanning range. Experimental test results show that the antenna array achieves can scan -78°-78° and -70°-70° at 2.3 GHz and 2.4 GHz, respectively.
3: This book designs a dual-port phase mode SSPPs antenna, which can scan in 3D free space.
4. Tao Xiaohui, Geng Junping*, Jin Ronghong, Liang Xianling, Wu Hao, “RFID Tag Antenna for Use on Metal”, iWAT, 2010.
