JPS6232602U - - Google Patents

Description

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the configuration of a microstrip bandpass filter showing an embodiment of the present invention;
Fig. 2 is an equivalent circuit diagram of the microstrip band pass filter shown in Fig. 1, Fig. 3 is an attenuation characteristic diagram of the microstrip band pass filter obtained by simulation, and Fig. 4 is a diagram of the present invention. FIG. 5 is a diagram showing the measurement results of the attenuation characteristics of the specific example. 2... One end open input line, 3... Both ends open line, 4... One end open output line, 5, 6, 7... Both ends open resonant line.

Claims (1)

[Scope of utility model registration request] In a microstrip filter circuit in which a ground conductor is placed on the back side of a dielectric substrate and a line is placed on the front side, first, second, and third lines having a line length corresponding to 1/2 wavelength of the passing frequency are arranged in parallel. an open-ended resonant line, an open-ended input line disposed close to one end of the first open-ended resonant line for inputting a high-frequency signal, and a third open-ended input line for outputting a high-frequency signal. an open-ended output line disposed close to one end of the resonant line; and an open-ended output line disposed between the open-ended input line and the open-ended output line, and close to one end of the second open-ended resonant line; A microstrip bandpass filter comprising a line with both ends open.