Title :
An active self-steering array using self-oscillating mixers
Author :
Shiroma, G.S. ; Chenyan Song ; Miyamoto, R.Y. ; Shiroma, W.A.
Author_Institution :
Dept. of Electr. Eng., Hawaii Univ. at Manoa, Honolulu, HI, USA
Abstract :
A retrodirective array using self-oscillating mixers (SOMs) is presented. SOMs allow for easier implementation of larger two-dimensional arrays by eliminating the complex local-oscillator (LO) feed structure. A four-element linear retrodirective array using SOMs is demonstrated at a LO frequency of 8.87 GHz. Each element is successfully phased locked at the LO frequency while 33 dB of isolation between adjacent elements is measured at the RF frequency. The LO power generated by a single SOM element at the fundamental frequency is +3 dBm. Retrodirectivity is successfully observed for scattering angles of -30/spl deg/, 0/spl deg/, and +15/spl deg/.
Keywords :
active antenna arrays; directive antennas; microstrip antenna arrays; microwave mixers; phase locked oscillators; 8.87 GHz; LO frequency; LO power; RF frequency; active self-steering array; four-element linear retrodirective array; local-oscillator feed structure elimination; patch antennas; phase locked elements; phase-conjugating array; retrodirective array; retrodirectivity; scattering angles; self-oscillating mixers; two-dimensional arrays; Circuits; Feeds; Frequency measurement; Mixers; Oscillators; Phase measurement; Phased arrays; Power generation; Radio frequency; Solar power generation;
Conference_Titel :
Microwave Symposium Digest, 2003 IEEE MTT-S International
Conference_Location :
Philadelphia, PA, USA
Print_ISBN :
0-7803-7695-1
DOI :
10.1109/MWSYM.2003.1210463
