Title :
A 360/spl deg/ retrodirective self-oscillating mixer array [using HEMTs]
Author :
Ah Yo, D.M.K. ; Forsyth, W.E. ; Shiroma, W.A.
Author_Institution :
Dept. of Electr. Eng., Hawaii Univ., Honolulu, HI, USA
Abstract :
A 360/spl deg/ retrodirective self-oscillating mixer (SOM) array is presented. The structure is composed of a 96-element transistor grid conformed around a cylindrical dielectric core. The three-dimensional architecture allows for retrodirectivity over a larger range of incident angles compared to planar retrodirective arrays. Use of the SOM´s free-running oscillation signal eliminates the need for an external LO. Experimental results at C-band confirm retrodirectivity of source beams incident at angles of 0/spl deg/, 20/spl deg/, -25/spl deg/ and -160/spl deg/ in the H-plane.
Keywords :
HEMT circuits; directive antennas; heterodyne detection; microwave antennas; microwave mixers; C-band; H-plane; cylindrical dielectric core; free-running oscillation signal; incident angles; retrodirective self-oscillating mixer array; retrodirectivity; source beams; three-dimensional architecture; transistor grid; Azimuthal plane; Bandwidth; Broadband antennas; Jamming; Oscillators; Planar arrays; Position measurement; RF signals; Radio frequency; Testing;
Conference_Titel :
Microwave Symposium Digest. 2000 IEEE MTT-S International
Conference_Location :
Boston, MA, USA
Print_ISBN :
0-7803-5687-X
DOI :
10.1109/MWSYM.2000.863305
