A Wideband Subharmonic Mixer Incorporating Signal Interference Technique Based Isolation Circuit
Sadhana Kumari1, Priyanka Monda2

1Sadhana Kumari*, Department of Electronics and Communication Engineering,. National Institute of Technology Patna, Patna, India.
2Priyanka Mondal, LERMA, Observatoire de Paris, Paris, France.
Manuscript received on July 12, 2019. | Revised Manuscript received on July 22, 2019. | Manuscript published on December 30, 2019. | PP: 132-136 | Volume-9 Issue-2, December, 2019. | Retrieval Number: B3072129219/2019©BEIESP | DOI: 10.35940/ijeat.B3072.129219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)

Abstract: A broadband (8.7 GHz – 11.5 GHz) performing passive sub-harmonic down-conversion mixer using signal interference technique (SIT) is demonstrated, designed and reported in this paper. The local oscillator (LO) frequency is half of the radio frequency (RF) for the 2xsub-harmonic mixer architecture; therefore, for the RF lying in the range 8.7 GHz to 11.5 GHz, required LO frequency range is 4.25 GHz to 5.65 GHz with 0.2 GHz fixed intermediate frequency (IF). With a broadband operation, designed prototype shows single sideband down-conversion loss in the range 9.6 dB – 12.6 dB. Moreover, large-signal testing infers an adequate linear trait of the proposed design, showing -3 dBm and 11.32 dBm for the 1 dB compression point and third order input intercept point, respectively.
Keywords: Isolation, Sub-harmonic mixer, Signal interference technique, Wideband.