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This paper presents a microwave bandpass filter using a triplet configuration to realize cross coupling. A structure called quarter-mode substrate integrated waveguide (QMSIW) is applied in these resonators to achieve the planar form. QMSIW is an isosceles right triangular microstrip patch loaded with an array of metallic via-holes along its hypotenuse which can be equivalent as an electric wall and...
In this paper, a split-ring resonator is loaded to a monopole antenna for the purpose of miniaturization. As a result, the monopole antenna is shortened from quarter wavelength to ninth wavelength. Then, a Non-Foster circuit is loaded to the input port of the SRR-based monopole antenna. Due to the negative capacitance characteristic, the Non-Foster circuit can offset the imaginary part of the input...
The development of receiving dual band or multiband antennas has witnessed explosive growth driven by their usefulness in the satellite navigation systems in recent years. A low profile dual-band circularly polarized (CP) antenna working at BD-B3 (1268MHz) and GPS-L1 (1590MHz) frequencies is designed in this paper. Four rectangular swells are added around the antenna to tune the resonant frequency...
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