Abstract
Dual-stage down-conversion mixer has been designed for use at 7/8 GHz. Both the mixer stages provide low conversion loss and very good isolation. MIC guide as well as MIC slot line configuration have been used for the first RF stage. In the MIC guide mode, mixer is tunable over 8–12 GHz band having instantaneous bandwidth of 200 MHz and conversion loss 4.0 dB (typ). In the MIC slot line mode, more than 25-dB isolation and conversion loss of 6-dB was achieved over 10 per cent bandwidth. The second stage uses a double balanced mixer in MIC hybrid configuration.
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