Continuously Tunable Ku-Band GaAs Bandstop Filter With Reconfigurable All-Pass Capabilities

Andrés Fontana; Dimitra Psychogiou

doi:10.1109/LMWT.2025.3580893

Continuously Tunable Ku-Band GaAs Bandstop Filter With Reconfigurable All-Pass Capabilities

Andrés Fontana
, Dimitra Psychogiou

Research output: Contribution to journal › Article › peer-review

Abstract

A multiconfigurable monolithic microwave integrated circuit (MMIC) filter is reported. It exhibits three modes of operation, namely, a high-attenuation single-notch bandstop (BS) mode, a dual-notch BS mode, and an all-pass (AP) mode. It is based on a bridged-T network (BTN) using a minimum number of lumped elements and a signal cancellation technique to counteract the effect of the low on-chip quality factor. Transfer function tuning and bandstop-to-all-pass filter (BSF-to-AP) mode reconfigurability are readily obtained by tuning the frequency of two resonators. A prototype was manufactured using a pHEMT GaAs MMIC process exhibiting a BS mode with frequency tuning range (Δƒ₀) of 16% and suppression up to 68.5 dB, a dual-notch BS mode with Δƒ₀ of 15% and 20% fractional bandwidth (FBW), and an AP mode with insertion loss <5.3 dB.

Original language	English
Journal	IEEE Microwave and Wireless Technology Letters
DOIs	https://doi.org/10.1109/LMWT.2025.3580893
Publication status	Accepted/In press - 2025

Keywords

Bandstop filter (BSF)
monolithic microwave integrated circuit (MMIC)
multifunction device
tunable filter

Access to Document

10.1109/LMWT.2025.3580893

Cite this

@article{24b5360e267a43a48d7f71bfd7d5f037,

title = "Continuously Tunable Ku-Band GaAs Bandstop Filter With Reconfigurable All-Pass Capabilities",

abstract = "A multiconfigurable monolithic microwave integrated circuit (MMIC) filter is reported. It exhibits three modes of operation, namely, a high-attenuation single-notch bandstop (BS) mode, a dual-notch BS mode, and an all-pass (AP) mode. It is based on a bridged-T network (BTN) using a minimum number of lumped elements and a signal cancellation technique to counteract the effect of the low on-chip quality factor. Transfer function tuning and bandstop-to-all-pass filter (BSF-to-AP) mode reconfigurability are readily obtained by tuning the frequency of two resonators. A prototype was manufactured using a pHEMT GaAs MMIC process exhibiting a BS mode with frequency tuning range (Δƒ0) of 16\% and suppression up to 68.5 dB, a dual-notch BS mode with Δƒ0 of 15\% and 20\% fractional bandwidth (FBW), and an AP mode with insertion loss <5.3 dB.",

keywords = "Bandstop filter (BSF), monolithic microwave integrated circuit (MMIC), multifunction device, tunable filter",

author = "Andr{\'e}s Fontana and Dimitra Psychogiou",

note = "Publisher Copyright: {\textcopyright} 2023 IEEE.",

year = "2025",

doi = "10.1109/LMWT.2025.3580893",

language = "English",

journal = "IEEE Microwave and Wireless Technology Letters",

issn = "2771-957X",

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AU - Fontana, Andrés

AU - Psychogiou, Dimitra

PY - 2025

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N2 - A multiconfigurable monolithic microwave integrated circuit (MMIC) filter is reported. It exhibits three modes of operation, namely, a high-attenuation single-notch bandstop (BS) mode, a dual-notch BS mode, and an all-pass (AP) mode. It is based on a bridged-T network (BTN) using a minimum number of lumped elements and a signal cancellation technique to counteract the effect of the low on-chip quality factor. Transfer function tuning and bandstop-to-all-pass filter (BSF-to-AP) mode reconfigurability are readily obtained by tuning the frequency of two resonators. A prototype was manufactured using a pHEMT GaAs MMIC process exhibiting a BS mode with frequency tuning range (Δƒ0) of 16% and suppression up to 68.5 dB, a dual-notch BS mode with Δƒ0 of 15% and 20% fractional bandwidth (FBW), and an AP mode with insertion loss <5.3 dB.

AB - A multiconfigurable monolithic microwave integrated circuit (MMIC) filter is reported. It exhibits three modes of operation, namely, a high-attenuation single-notch bandstop (BS) mode, a dual-notch BS mode, and an all-pass (AP) mode. It is based on a bridged-T network (BTN) using a minimum number of lumped elements and a signal cancellation technique to counteract the effect of the low on-chip quality factor. Transfer function tuning and bandstop-to-all-pass filter (BSF-to-AP) mode reconfigurability are readily obtained by tuning the frequency of two resonators. A prototype was manufactured using a pHEMT GaAs MMIC process exhibiting a BS mode with frequency tuning range (Δƒ0) of 16% and suppression up to 68.5 dB, a dual-notch BS mode with Δƒ0 of 15% and 20% fractional bandwidth (FBW), and an AP mode with insertion loss <5.3 dB.

KW - Bandstop filter (BSF)

KW - monolithic microwave integrated circuit (MMIC)

KW - multifunction device

KW - tunable filter

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DO - 10.1109/LMWT.2025.3580893

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JO - IEEE Microwave and Wireless Technology Letters

JF - IEEE Microwave and Wireless Technology Letters

ER -

Continuously Tunable Ku-Band GaAs Bandstop Filter With Reconfigurable All-Pass Capabilities

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Keywords

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