Varactor-Tuned Dual-Mode Frequency Discriminator for Instantaneous Frequency Measurements

In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated which doubles the discriminator tuning bandwidth. To prove its validity a prototype of the tunable dual-mode microstrip resonator is manufactured and the measured results are used to study the frequency discriminator response. This new approach can cover almost an octave of frequency range from 1.05 to 2 GHz with a sensitivity of 45 V/GHz and 21 V/GHz for the first and second mode, respectively.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Circuitos de Radiofrecuencia de Banda Ultra-Ancha en Tecnología Planar Integrada: Aplicación a Receptores de Seis Puertos

Se presenta el diseño, implementación y evaluación experimental de un demodulador I/Q de seis puertos analógico de altas prestaciones, capaz de operar en la banda de 3.1 a 10.6 GHz sin necesidad de técnicas de calibración. El objetivo es reducir en la medida de lo posible los requisitos tanto de la etapa de conversión analógico-digital, como de la etapa de post-procesado, lo que redundaría en una reducción sustancial de la complejidad y del coste final de este tipo de demoduladores

Discriminador de frecuencia basado en resonadores “dual-mode” sintonizables

Presentado en el XXVIII Simposium Nacional de la Unin Cientfica Internacional de Radio. URSI 2013, Santiago de Compostela, 11 al 13 de septiembre de 2013.In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated. In this circuit, the two tuned modes of the resonators are used independently to cover different frequency ranges, potentially doubling the tuning frequency range of the classic approach. To prove its validity a prototype of the tunable dual-mode microstrip resonator is manufactured and the measured results are used to study the frequency discriminator response. This new approach can cover almost an octave of frequency range from 1.05 to 2 GHz with a sensitivity of 45 V/GHz and 21 V/GHz for the first and second mode, respectively.Este trabajo ha sido financiado por la Consejería de Ciencia, Innovación y Empresa de la Junta de Andalucía bajo los proyectos P09-TIC-5268,MUPHY y una beca FPDI(780008),y por la empresa AT4Wireless bajo el contrato 8.06/5.59.3165. Universidad de Málaga,Campus de Excelencia Internacional Andalucía Tec

Butler Matrix Based Six-port Passive Junction

In this work we propose the utilization of the Butler matrix as a six-port I/Q demodulator. The inherent symmetry of its topology allows to overcome the intrinsic amplitude and phase imbalances of the traditional approaches making it more suitable for the design of high performance six-port networks. To demonstrate the validity of the proposal a Butler matrix has been designed covering the complete UWB band and its results are compared with the traditional approaches

Discriminador de frecuencia basado en resonadores “dual-mode” sintonizables

Presentado en el XXVIII Simposium Nacional de la Unin Cientfica Internacional de Radio. URSI 2013, Santiago de Compostela, 11 al 13 de septiembre de 2013.In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated. In this circuit, the two tuned modes of the resonators are used independently to cover different frequency ranges, potentially doubling the tuning frequency range of the classic approach. To prove its validity a prototype of the tunable dual-mode microstrip resonator is manufactured and the measured results are used to study the frequency discriminator response. This new approach can cover almost an octave of frequency range from 1.05 to 2 GHz with a sensitivity of 45 V/GHz and 21 V/GHz for the first and second mode, respectively.Este trabajo ha sido financiado por la Consejería de Ciencia, Innovación y Empresa de la Junta de Andalucía bajo los proyectos P09-TIC-5268,MUPHY y una beca FPDI(780008),y por la empresa AT4Wireless bajo el contrato 8.06/5.59.3165. Universidad de Málaga,Campus de Excelencia Internacional Andalucía Tec

Varactor-Tuned Dual-Mode Frequency Discriminator for Instantaneous Frequency Measurements

In this paper a novel varactor-tuned frequency discriminator that makes use of two tunable dual-mode microstrip resonators is demonstrated which doubles the discriminator tuning bandwidth. To prove its validity a prototype of the tunable dual-mode microstrip resonator is manufactured and the measured results are used to study the frequency discriminator response. This new approach can cover almost an octave of frequency range from 1.05 to 2 GHz with a sensitivity of 45 V/GHz and 21 V/GHz for the first and second mode, respectively.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Butler Matrix Based Six-port Passive Junction

In this work we propose the utilization of the Butler matrix as a six-port I/Q demodulator. The inherent symmetry of its topology allows to overcome the intrinsic amplitude and phase imbalances of the traditional approaches making it more suitable for the design of high performance six-port networks. To demonstrate the validity of the proposal a Butler matrix has been designed covering the complete UWB band and its results are compared with the traditional approaches