Title :
A Novel C-Band Single Diode Mixer with Ultra High LO/RF and LO/IF Isolation
Author :
Maalik, A. ; Mahmood, Zohaib
Author_Institution :
SUPARCO SRDC Lahore, Lahore
Abstract :
A novel single diode mixer with ultra high LO/RF, LO/IF isolation and having a reasonably good conversion loss has been designed. RF and LO signals are applied through bandpass and lowpass filters respectively. The mixer operates in C-Band and downconverts a Hock of frequencies (5.925 GHz -6.425 GHz) to a block of frequencies (3.7 GHz - 4.2 GHz) using a fixed frequency local oscillator at 2.225 GHz. The proposed mixer structure achieves double balanced functionality with a single diode and obviates the need for RF and LO baluns. The measured conversion loss ranges from 8 -10 dB and port isolations are in excess of 60 dB.
Keywords :
high-pass filters; low-pass filters; microwave filters; microwave mixers; C-band single diode mixer; bandpass filters; conversion loss; frequency 2.225 GHz; frequency 3.7 GHz to 4.2 GHz; frequency 5.925 GHz to 6.425 GHz; local oscillator; loss 8 dB to 10 dB; lowpass filters; ultra-high LO-IF port isolation; ultra-high LO-RF port isolation; Circuit topology; Frequency conversion; Impedance matching; Microwave FETs; Mixers; Noise figure; Performance gain; RF signals; Radio frequency; Schottky diodes; Mixer operation; Mixers; Passive mixers; Single diode mixers; port-to-port isolation;
Conference_Titel :
Electrical Engineering, 2007. ICEE '07. International Conference on
Conference_Location :
Lahore
Print_ISBN :
1-4244-0893-8
Electronic_ISBN :
1-4244-0893-8
DOI :
10.1109/ICEE.2007.4287326
