Title: Design of a microwave down-converter module

Authors: Xueyu Huang; Yongbo Xiang; Chuangming Tong; Na Wei

Addresses: Air and Missile Defense College, AFEU, Xi'an, 710051, China ' Air and Missile Defense College, AFEU, Xi'an, 710051, China ' Air and Missile Defense College, AFEU, Xi'an, 710051, China ' Air and Missile Defense College, AFEU, Xi'an, 710051, China

Abstract: Microwave down-converter modules are the key components in communications, radar and electronic warfare systems. The paper presents the design method of a low noise microwave down-converter module. The parameter of each component could be determined by the related parameter curves of the low noise amplifier, the mixer and the noise figure of the system. So, a list of parts which satisfied the needs could be selected out to complete the design. By using two cascaded low noise amplifies in the front end of the circuit, the low noise performance is fulfilled. A mirror suppression balanced mixer is followed to complete the frequency change, which can reduce the mixer noise effectively. Last, two cascaded intermediate frequency amplifies are putted to match the need of the total power gain. A down-converter for up-l ink wideband code division multiple access (WCDMA) repeater is designed according to the analysed result, the overall noise figure is less than 0.8 dB, and the total gain is around 66 dB with 0.8 dB ripple under 60 MHz bandwidth.

Keywords: down-converter design; low noise amplifier; mixer noise; microwave down-converter modules; wideband code division multiple access; WCDMA repeater.

DOI: 10.1504/IJICT.2015.068408

International Journal of Information and Communication Technology, 2015 Vol.7 No.2/3, pp.324 - 332

Received: 10 Jul 2014
Accepted: 07 Aug 2014

Published online: 13 Mar 2015 *

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