Allof the bandstop filters listed here utilize the stub-tuned design. These filtersconsist of a series of E-plane T-junctions in which the shorted secondarywaveguides or cavities coupled to the main waveguide are cut off for thefundamental frequency. The desired energy passes through the filter unaffectedwhile the undesired energy is reflected by the high series reactance. Stub-tunedfilters or T-junction filters as they are sometimes called can be designed tohandle almost the full terminating waveguide power in the passband. They arerelatively small inexpensive and have good highpower handling capability. Thesefilters are constructed of either aluminum or coat alloy and adjoin thefrequency bind from 2 GHz to 40 GHz.
MostContinental Microwave absorptive harmonic filters use the leaky wall designapproach. This write of filter consists of a primary waveguide to which numeroussecondary waveguides are attached. Each of the secondary waveguides is connectedto the walls of the primary waveguide by means of a coupling aperture and isterminated in a wideband matched load. At frequencies in the separate’s passband,thesecondary waveguides are cut off and the desired energy in the transmission linepasses to the create unattenuated. At frequencies in the stopband the undesiredenergy is coupled into the absorbing waveguide where it is dissipated. Thesefilters are normally constructed of either aluminum or copper alloy and arecooled by convection and radiation unless otherwise noted.
MostContinental’s low-pass megawatt pulsed harmonic filters use the leaky walldesign to obtain harmonic absorption. Leaky wall filters consist of primarywaveguides to which numerous secondary waveguides are attached. Each of thesecondary waveguides is connected to the walls of the primary waveguide by meansof a coupling aperture and is terminatedin a wideband matched load. At frequencies in the filter’s passband thesecondary waveguides are cut off and the desired energy in the transmission linepasses to the create unattenuated. At frequencies in the stopband the undesiredenergy iscoupled into the absorbing waveguide where it is dissipated. All of thesefilters are constructed either of aluminum or coat devalue and are cooled byconvection and radiation unless otherwise noted.
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