Publication

Tunable Acoustic Filter with High-Electroacoustic Coupling Resonators

2026

Abstract

This paper presents the development of a tunable filter based on acoustic resonators with very large electroacoustic coupling. The implemented filter consists in an in-line topology where the acoustic resonators are coupled through variable capacitors (varactors). The filter is centered at 1GHz with 10 MHz bandwidth and is formed by four resonators and eleven varactors that allow the control of individual resonant frequency of the resonators, the coupling between resonators, and the input/output matching. The whole filter has been fit in a reduced area of 7 × 16 mm2, including the DC-feeding blocks with the corresponding inductances and capacitances. The filter has been manufactured and measured demonstrating a feasible tuning range of 40 MHz and a bandwidth control of 100%.

Official source

https://infoscience.epfl.ch/entities/publication/8bc44068-bb6b-4fa8-95b8-52edf7b5d7c6

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

2026

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/8bc44068-bb6b-4fa8-95b8-52edf7b5d7c6

About this result

Related concepts (32)

Analogue filter

Analogue filters are a basic building block of signal processing much used in electronics. Amongst their many applications are the separation of an audio signal before application to bass, mid-range, and tweeter loudspeakers; the combining and later separation of multiple telephone conversations onto a single channel; the selection of a chosen radio station in a radio receiver and rejection of others.

Electronic filter

Electronic filters are a type of signal processing filter in the form of electrical circuits. This article covers those filters consisting of lumped electronic components, as opposed to distributed-element filters. That is, using components and interconnections that, in analysis, can be considered to exist at a single point. These components can be in discrete packages or part of an integrated circuit. Electronic filters remove unwanted frequency components from the applied signal, enhance wanted ones, or both.

Resonator

A resonator is a device or system that exhibits resonance or resonant behavior. That is, it naturally oscillates with greater amplitude at some frequencies, called resonant frequencies, than at other frequencies. The oscillations in a resonator can be either electromagnetic or mechanical (including acoustic). Resonators are used to either generate waves of specific frequencies or to select specific frequencies from a signal. Musical instruments use acoustic resonators that produce sound waves of specific tones.

Related publications (21)

Tunable Acoustic Filter with High-Electroacoustic Coupling Resonators

Chat with Graph Search

Beyond spectral gap (extended): The role of the topology in decentralized learning

Extraction and Analysis of Short-Time Excursions in RR-interval Time Series

A noise reduction circuit technique for CMOS terahertz imaging