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Design of a Compact Ka-band Balanced Mixer Based on a Novel Wide-band Equivalent Circuit of the Schottky Diode

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Abstract

A compact Ka-band balanced mixer based on a novel Schottky diode model is presented in this paper. According to its physical structure, a novel 3D electromagnetic model of the Schottky diode is proposed. Meanwhile, a wide-band equivalent circuit is built, which takes all high frequency effects existing in the diode into account. All the parasitic reactances are extracted from the electromagnetic model-based S-parameters up to 110 GHz. Based on the proposed equivalent circuit, a Ka-band balanced mixer is designed and optimized, where bandpass filters with open stubs and a lowpass filter based on defected ground structure cells are used. The measured results show that the conversion loss is below 9 dB from 30 GHz to 40 GHz with the minimum of 6.7 dB at 35 GHz. The normalized size of the mixer is only 3.3λ g  × 3.3λ g , whereλ g is the wavelength at 35 GHz.

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Authors and Affiliations

  1. Laboratory of Microwave Communication and Electronic Systems, Beijing Institute of Technology, Beijing, 100081, People’s Republic of China

    Jinchao Mou, Weihua Yu, Yong Yuan & Xin Lv

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  1. Jinchao Mou
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  2. Weihua Yu
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  3. Yong Yuan
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  4. Xin Lv
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Correspondence to Weihua Yu.

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Mou, J., Yu, W., Yuan, Y. et al. Design of a Compact Ka-band Balanced Mixer Based on a Novel Wide-band Equivalent Circuit of the Schottky Diode. J Infrared Milli Terahz Waves 32, 466–481 (2011). https://doi.org/10.1007/s10762-011-9777-6

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  • DOI: https://doi.org/10.1007/s10762-011-9777-6

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