Title :
A retrodirective array using unbiased subharmonic resistive mixers
Author :
de Diego, A. ; García, J.A. ; Mediavilla, A.
Author_Institution :
Dept. Ing. Commun., Cantabria Univ., Spain
Abstract :
In this paper, a novel phase conjugator is proposed for its use in retrodirective arrays. A balanced configuration, based on subharmonic E-PHEMT resistive mixers, allows good conversion characteristics without the need for biasing voltages. The behavior of a FET in resistive mixing function is discussed, to show the possibility of unbiased operation when introducing E-PHEMT technology. Results for the conversion efficiency and the interrogating frequency cancellation are presented. Finally, a four element array is implemented and characterized in terms of its monostatic and bistatic radiation diagrams, validating the proposed approach.
Keywords :
active antenna arrays; high electron mobility transistors; microwave mixers; FET; biasing voltages; bistatic radiation diagram; conversion efficiency; field effect transistor; four element array; interrogating frequency cancellation; monostatic radiation diagram; phase conjugator; resistive mixing function; retrodirective array; subharmonic enhancement mode PHEMT resistive mixers; unbiased subharmonic resistive mixers; Diodes; FETs; HEMTs; Linearity; Local oscillators; Noise figure; PHEMTs; Phased arrays; Radio frequency; Voltage;
Conference_Titel :
Microwave Symposium Digest, 2004 IEEE MTT-S International
Print_ISBN :
0-7803-8331-1
DOI :
10.1109/MWSYM.2004.1339215
