| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem that when a microstrip line is connected to a waveguide, there is a limit of reducing the connection loss by using only aλ/4 matching circuit. SOLUTION: In the conversion between the microstrip line of TEM wave transmission and the waveguide of TE01 mode wave transmission, if the cross-sections of the microstrip line and the waveguide are substantially the same size, in the case of a 40Ωmicrostrip line when the characteristic impedance of the waveguide is about 80%, i.e., 40Ω, the line conversion loss can be optimally reduced. Therefore, the microstrip line is connected to the waveguide using aλ/4 matching circuit by means of a ridged waveguide section having a low impedance and a length ofλ/16 or less. COPYRIGHT: (C)2008,JPO&INPIT
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