EXPERIMENTAL INVESTIGATION OF FREQUENCY CHARACTERISTICS OF THE SEVEN-STAGE FILTERS REALIZED ON THE SLOT MEMBRANES WITH VALUES OF THE SLOTS ABOUT 1 MM AND 22 MM IN THE RECTANGULAR WAVEGUIDE WITH OPERATING SECTION 35X15 MM
The paper presents the design and frequency characteristics of the two seven-stage microwave filters made on slot membranes cascaded with width of slot about 1 mm and 22 mm located in waveguide with operating section 35x15 mm. It is shown that in the range 4,2... 8,9 GHz such filters exhibit an amplitude-frequency characteristics (AFC) of broadband type with two multiple passbands and one stopband there between. The transmission losses in the passbands amounts to between 1,3 to 5 dB, and the attenuation in the stopband to values of more than 70 dB. In paper shows the frequency characteristics of VSWR values of input filters.