Modeling and Measurements of Novel Monolithic Filters

Abstract

This paper presents novel multilayer tuneable highQ-filters based on hairpin resonators including ferroelectric materials. This configuration allows the miniaturization of these filters to a size that makes them suitable for chip and package integration and narrow-band applications. The main focus was miniaturizing filters with coupled loops using multilayer dielectric substrates. A further goal was to increase the quality factor of these distributed filters by embedding high dielectric materials in a multilayer high- and low-k(dielectric constant) substrate that is supported by LTCC technology. An improved W-shape bandpass filter was proposed with a wide stopband and approximately 5% bandwidth.

Multilayer End Coupled Band Pass Filter using Low-Temperature Co-Fired Ceramic Technology for Broadband Fixed Wireless

“…In general, the bandpass filter is one of an important passive component in microwave and millimeter wave communication system because of its function for permitting signal in the desired range of frequencies and rejecting all other. There are many filter topologies at microwave and mm-wave frequencies as reported such as the parallel-coupled-resonator filters [4] and the hairpin resonator filters [5] which have a problem with a large size, the high loss due to the increased resonator capacitance, low stopband rejection, and spurious response at the filter's harmonics.We need to use different feed topologies and multilayer structure to reduce the size and improve insertion loss such as parallel-coupled-feed structure [6], tapped-line [7], and the end-coupled structures [8].…”