TY - JOUR A1 - Cañete Rebenaque, David AU - Martínez Mendoza, Mónica AU - Gómez Tornero, José Luis AU - Pascual García, Juan AU - Álvarez Melcón , Alejandro T1 - Analysis and implementation of different topologies of transversal filters in planar technology Y1 - 2008 SN - 0048-6604 UR - http://hdl.handle.net/10317/1592 AB - This paper uses a simple configuration to implement microwave transversal filters based on microstrip technology. The structure is of second order and implements two transmission zeros and two reflection zeros in the frequency response of the filter. The basic configuration consists of input and output ports coupled in a shunt configuration to two printed resonators of different lengths. A modification of the original structure is introduced to allow an additional direct coupling between the source and the load. Depending on the value and the sign of the coupling terms, different frequency responses can be obtained. In this way, small modifications in the basic structure allow to obtain band-pass or band-stop responses. Following this circuit topology, the paper discusses the possibilities to have transmission zeros in the real or in the complex plane and their effects on the frequency response and on the group delay of the filter. Also, two practical implementations in microstrip technology are proposed, and a third filter implementing group delay equalization is demonstrated. Measured results confirm theoretical predictions and validate the structures for practical applications. KW - Teoría de la Señal y las Comunicaciones KW - Microstrip filter KW - Transversal topology KW - Transmission zeros KW - Filtros micro franja KW - Topología transversal KW - Transmisión de ceros LA - eng PB - American Geophysical Union (AGU) ER -