Title :
5-6 GHz monolithically integrated calibratable low-noise downconverter for smart antenna arrays
Author :
Brauner, T. ; Vogt, R. ; Bächtold, W.
Author_Institution :
Lab. for Electromagn. Fields & Microwave Electron., Swiss Fed. Inst. of Technol., Zurich, Switzerland
Abstract :
An integrated downconverter for active antenna arrays is presented. From 5.125 GHz to 5.875 GHz the downconverter shows more than 20 dB conversion gain and a noise figure of less than 3.8 dB with a minimum of 3.3 dB. Input 1 dB compression point is -18 dBm. Image rejection better than 35 dB is achieved using an integrated lumped-element bandpass filter. A switchable symmetric input amplifier is proposed to calibrate amplitude and phase errors without degrading the noise figure.
Keywords :
MMIC frequency convertors; active antenna arrays; adaptive antenna arrays; calibration; 20 dB; 3.3 to 3.8 dB; 5 to 6 GHz; active antenna array; amplitude error; calibration; conversion gain; image rejection; low-noise downconverter; lumped-element bandpass filter; monolithic integration; noise figure; phase error; smart antenna array; switchable symmetric input amplifier; Antenna arrays; Band pass filters; Degradation; Filtering; Frequency; Image converters; Linearity; Microwave antenna arrays; Noise figure; Switches;
Conference_Titel :
Radio Frequency Integrated Circuits (RFIC) Symposium, 2003 IEEE
Print_ISBN :
0-7803-7694-3
DOI :
10.1109/RFIC.2003.1213979
