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This paper introduces a simple technique to compensate the lost gain due to the dielectric loss of the printed log periodic dipole array (PLPDA) antenna. First, a simple Printed LPDA is designed then by removing the dielectric between radiating elements, the PLPDA is changed into Cut PLPDA (CPLPDA). This change causes to compensate antenna gain by 1 dB approximately. Moreover, a simultaneously weight...
In this letter, a novel waveguide bandpass filter with fractal-shaped irises is presented. By applying first iteration Koch fractal-shaped irises, the bandwidth is increased to more than 3.15times and the overall size is reduced to about 2.8times in comparison to a waveguide filter with rectangular-shaped irises. The proposed filter is simulated using Ansoft HFSS and fabricated, which is verified...
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