Balanced-To-Balanced Microstrip Diplexer Based on Magnetically Coupled Resonators
|Author||Fernández Prieto, Armando
Martel Villagrán, Jesús
Medina Mena, Francisco
Rodríguez Boix, Rafael
|Department||Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
Universidad de Sevilla. Departamento de Física Aplicada II
|Published in||IEEE Access, 6, 18536-18547.|
|Abstract||Two balanced-To-balanced planar diplexers based on magnetically coupled microstrip resonators are proposed in this paper. For the first prototype, each channel/differential-output is composed of a second order single-band ...
Two balanced-To-balanced planar diplexers based on magnetically coupled microstrip resonators are proposed in this paper. For the first prototype, each channel/differential-output is composed of a second order single-band balanced bandpass filter based on open-loop resonators. For the second diplexer example, the filters composing the differential outputs are fourth order and are implemented by means of folded stepped-impedance resonators. The design procedure for the differential response is quite straightforward, since it is based on the use of the well-known external quality factor and coupling coefficients concepts. Common-mode is inherently rejected thanks to the benefits of magnetic coupling, which precludes common-mode transmission over a wide frequency range. The proposed structure also offers a high level of channel-To-channel isolation. To demonstrate the usefulness of the proposed idea, the two prototypes are simulated, fabricated, and measured. Good differential-mode and common-mode performance is observed in both examples. Simulations and measurements show good agreement.
|Cite||Fernández Prieto, A., Lujambio, A., Martel Villagrán, J., Medina Mena, F., Martín, F. y Rodríguez Boix, R. (2018). Balanced-To-Balanced Microstrip Diplexer Based on Magnetically Coupled Resonators. IEEE Access, 6, 18536-18547.|