JPS6181202U

JPS6181202U -

Info

Publication number: JPS6181202U
Application number: JP16369884U
Authority: JP
Priority date: 1984-10-31
Filing date: 1984-10-31
Publication date: 1986-05-29

Description

[Brief explanation of the drawing]

第２図は従来の周波数合成回路、第３図は第２
図における線路長の役割をスミスチヤートを用い
て説明する図、第１図は本考案の実施例の周波数
合成回路である。１，１′：受信周波数用帯域通過形フイルタ、
２，２′：局部発振周波数用帯域通過形フイルタ
、５′：受信信号入力ストリツプ線路、６′：局
部発振信号入力ストリツプ線路、８′：周波数合
成回路の出力ストリツプ線路、９，１１：各フイ
ルタの入力端子、１０，１２：各フイルタの出力
端子。 Figure 2 shows the conventional frequency synthesis circuit, Figure 3 shows the 2nd frequency synthesis circuit.
FIG. 1, which is a diagram explaining the role of the line length in the diagram using a Smith chart, is a frequency synthesis circuit according to an embodiment of the present invention. 1, 1': Band-pass filter for receiving frequency,
2, 2': Band-pass filter for local oscillation frequency, 5': Received signal input strip line, 6': Local oscillation signal input strip line, 8': Frequency synthesis circuit output strip line, 9, 11: Each filter input terminal, 10, 12: output terminal of each filter.

Claims

[Scope of utility model registration request]

In a frequency synthesis circuit using a band-pass filter for passing a received signal and a band-pass filter for passing a local oscillation signal, an output terminal of the band-pass filter for passing a received signal, the input terminal of which is connected to a strip line to which the received signal is applied. and the output terminal of the band-pass filter for passing the local oscillation signal, whose input terminal is connected to a strip line to which the local oscillation signal is applied, are connected to each other by a strip line of the shortest distance, and the band-pass filter for passing the local oscillation signal is A frequency synthesis circuit characterized in that a matrix line connected to a frequency converter is connected to an output terminal of the frequency converter.