Title :
A digital sum-difference millimeter wave monopulse system based on microstrip array antenna
Author :
Xu, Qiang ; Sun, Houjun ; Yang, Huaizhi ; Lu, Xin
Author_Institution :
Dept. of Electron. Eng., Beijing Inst. of Technol., Beijing
Abstract :
In this paper, a digital sum-difference monopulse system based on four-subarray microstrip antenna is presented. In transmitting, a high gain transmitting beam is obtained from spatial power combining. Gain of transmitting beam is better than 29.5dB. In receiving, we remove sum and difference network. Sum and difference signals are obtained by addition and subtraction operations of signals received from microstrip antenna with four subarrays. Noise figure of four-channel receiver is ameliorated by removing millimeter wave sum-difference network. Phase balances between the four transmitting channels are adjusted by dielectric loaded method[l]. Amplitude and phase imbalances between receiving channels are compensated in signal processing module.
Keywords :
microstrip antenna arrays; millimetre wave antenna arrays; amplitude imbalances; dielectric loaded method; digital sum-difference monopulse system; four-channel receiver; gain 29.5 dB; microstrip antenna; microstrip array antenna; millimeter wave system; phase imbalances; signal processing module; spatial power combining; transmitting beam; Azimuth; Boring; Circuits; Direction of arrival estimation; Directive antennas; Equations; Microstrip antenna arrays; Microstrip antennas; Millimeter wave technology; Signal processing;
Conference_Titel :
Microwave Conference, 2008. APMC 2008. Asia-Pacific
Conference_Location :
Macau
Print_ISBN :
978-1-4244-2641-6
Electronic_ISBN :
978-1-4244-2642-3
DOI :
10.1109/APMC.2008.4957876
