发明名称 MICROWAVE LOW NOISE CONVERTER
摘要 PURPOSE:To make the size small, to reduce noise and to facilitate the adjustment by forming a mixer circuit, a dielectric oscillating circuit and an IF amplifier on a dielectric base with a low dielectric constant. CONSTITUTION:An RF signal inputted to an RF input terminal 1 is converted into an IF signal by a mixer circuit 4 via a low noise amplifier circuit 2, amplified by an IF amplifier 5 and outputted to an IF output terminal 6. The circuit 2 consists of chip capacitors 7, 8 and transistors(TRs) 9, 10, the circuit 4 an RF filter 15 using a semiconductor resonator 24 comprising a microstrip line, an LP filter 16, an IFLPF 18 using a microstrip line 25 whose length is 1/4 wavelength and a diode 17, and the dielectric oscillation circuit 3 consists of a resonance circuit comprising a TR 13, a dielectric resonator 19 and a microstrip line 14 whose length is 1 wavelength. The circuit 22 is formed on the base 22 with a low dielectric constant, the circuits 3-5 are constituted on the same dielectric base 21 and the bases 21,22 are connected by a connection terminal 20.
申请公布号 JPH02215209(A) 申请公布日期 1990.08.28
申请号 JP19890036767 申请日期 1989.02.16
申请人 MATSUSHITA ELECTRIC IND CO LTD 发明人 OOSUMI YUUJI;TAKAHASHI HIROSHI;SATO TAKESHI
分类号 H01P3/08;H03D9/06 主分类号 H01P3/08
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