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3. 3. B.A. Rozanov, S.B. Rozanov, Millimeter Wave Receivers, Radio i Svyaz', Moscow, 1989 (in Russian).
4. 4. S.V. Kukarin, Microwave Electronic Devices: Specifications, Application, Progress Trends, 2nd Ed., Radio i Svyaz', Moscow, 1981 (in Russian).
5. Microwave mixer and detector diodes