Microwave integrated tunable filters
- Autores: Zabdiel Brito Brito
- Directores de la Tesis: Ignacio Llamas Garro (dir. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2010
- Idioma: español
- Tribunal Calificador de la Tesis: Eduardo Artal Latorre (presid.), Lluis Pradell Cara (secret.), Julien Perruisseau Carrier (voc.), Mike Lancaster (voc.), David Girbau Sala (voc.)
- Materias:
- Texto completo no disponible (Saber más ...)
- Resumen
Tunable filters with precise control of their central frequency, bandwidth and selectivity are the objectives and main area of study of this thesis. Tunability was achieved using PIN diodes for discrete control; meanwhile continuous control was achieved using varactor diodes. Topologies include tunable bandstop filters and tunable band pass filters. Basically filters' central frequency was controlled by changing resonator electrical length. Filter bandwidth was controlled choosing adequate normalized reactance slope parameter values for bandstop filters; and selecting optimum coupling coefficients for bandpass filters. Selectivity was tuned by altering the electric coupling in a quasi-elliptic bandpass filter or changing the electrical length of a cross coupling line in a bandstop filter. Measured results show very good agreement with the simulations, and successfully fulfil the objectives of this thesis. Tunable filters using other types of switching elements such as MEMS, were also developed during the thesis. MEMS tunable filters use DC contact switches, varactors or actuators applied to different bandstop and band pass filters.
