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A planar dipole antenna loaded with bandstop reflector is presented and investigated. The loading structure is composed of two symmetrically positioned twin lines. The loading structure acts as a bandstop filter in the corresponding frequency band, and meanwhile functions as a reflector in the operating frequency band, which is not a combination but an integration of reflector and bandstop filter...
This paper presents tunable microstrip bandpass filters. These filters are based on Stub-Loaded Resonators. By properly loading these resonators by variable capacitance (such as varactor diode), the center frequency can be easily controlled. Thanks to the chosen topology, the loading capacitors have no impact in the out-of-band rejection. A complete resonant mode analysis is investigated. The concept...
This work investigates the impact of dielectric loading on the RF performances of integrated VCO and PLL systems. Both On-Chip and System-Level (On-Board) experimental characterizations are carried out to determine influence of various substances (resins, salted water, petroleum, sugar mixture) on frequency variations, taking into account the importance of mechanical fixture. Calibration and monitoring...
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