Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications

Xuguang Jin; Donghao Li; Yuxuan Zhang; Changjiang Deng

doi:10.1109/NEMO62710.2025.11215507

Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications

Xuguang Jin
, Donghao Li
, Yuxuan Zhang
, Changjiang Deng

School of Integrated Circuits and Electronics

Beijing Institute of Technology

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

A miniaturized Planar Inverted F-shaped Antenna (PIFA) using active matching is presented for 5 G mobile terminal applications in this paper. The antenna structure has a small volume of 28.5 × 5 × 2 mm³. In order to cover the bandwidth below 1 GHz, non-Foster circuit is introduced for active matching. It can produce equivalent negative inductance, and achieve conjugated matching with the electrically small PIFA. The simulated -10 dB bandwidth ranges from 600 MHz to 1 GHz. What's more, the gain enhancement is more than 8 dB in the bandwidth.

Original language	English
Title of host publication	IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
ISBN (Electronic)	9798331597993
DOIs	https://doi.org/10.1109/NEMO62710.2025.11215507
Publication status	Published - 2025
Event	2025 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Tianjin, China Duration: 29 Jul 2025 → 1 Aug 2025

Publication series

Name	IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings

Conference

Conference	2025 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025
Country/Territory	China
City	Tianjin
Period	29/07/25 → 1/08/25

Keywords

Active antenna matching
negative impedance converter
non-Foster circuit
planar inverted F antenna

Access to Document

10.1109/NEMO62710.2025.11215507

Cite this

Jin, X., Li, D., Zhang, Y., & Deng, C. (2025). Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications. In IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings (IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/NEMO62710.2025.11215507

Jin, Xuguang ; Li, Donghao ; Zhang, Yuxuan et al. / Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications. IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2025. (IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings).

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title = "Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications",

abstract = "A miniaturized Planar Inverted F-shaped Antenna (PIFA) using active matching is presented for 5 G mobile terminal applications in this paper. The antenna structure has a small volume of 28.5 × 5 × 2 mm3. In order to cover the bandwidth below 1 GHz, non-Foster circuit is introduced for active matching. It can produce equivalent negative inductance, and achieve conjugated matching with the electrically small PIFA. The simulated -10 dB bandwidth ranges from 600 MHz to 1 GHz. What's more, the gain enhancement is more than 8 dB in the bandwidth.",

keywords = "Active antenna matching, negative impedance converter, non-Foster circuit, planar inverted F antenna",

author = "Xuguang Jin and Donghao Li and Yuxuan Zhang and Changjiang Deng",

note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 2025 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 ; Conference date: 29-07-2025 Through 01-08-2025",

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doi = "10.1109/NEMO62710.2025.11215507",

language = "English",

series = "IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

booktitle = "IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings",

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Jin, X, Li, D, Zhang, Y & Deng, C 2025, Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications. in IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings. IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings, Institute of Electrical and Electronics Engineers Inc., 2025 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025, Tianjin, China, 29/07/25. https://doi.org/10.1109/NEMO62710.2025.11215507

Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications. / Jin, Xuguang; Li, Donghao; Zhang, Yuxuan et al.
IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings. Institute of Electrical and Electronics Engineers Inc., 2025. (IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications

AU - Jin, Xuguang

AU - Li, Donghao

AU - Zhang, Yuxuan

AU - Deng, Changjiang

PY - 2025

Y1 - 2025

N2 - A miniaturized Planar Inverted F-shaped Antenna (PIFA) using active matching is presented for 5 G mobile terminal applications in this paper. The antenna structure has a small volume of 28.5 × 5 × 2 mm3. In order to cover the bandwidth below 1 GHz, non-Foster circuit is introduced for active matching. It can produce equivalent negative inductance, and achieve conjugated matching with the electrically small PIFA. The simulated -10 dB bandwidth ranges from 600 MHz to 1 GHz. What's more, the gain enhancement is more than 8 dB in the bandwidth.

AB - A miniaturized Planar Inverted F-shaped Antenna (PIFA) using active matching is presented for 5 G mobile terminal applications in this paper. The antenna structure has a small volume of 28.5 × 5 × 2 mm3. In order to cover the bandwidth below 1 GHz, non-Foster circuit is introduced for active matching. It can produce equivalent negative inductance, and achieve conjugated matching with the electrically small PIFA. The simulated -10 dB bandwidth ranges from 600 MHz to 1 GHz. What's more, the gain enhancement is more than 8 dB in the bandwidth.

KW - Active antenna matching

KW - negative impedance converter

KW - non-Foster circuit

KW - planar inverted F antenna

UR - https://www.scopus.com/pages/publications/105022607674

U2 - 10.1109/NEMO62710.2025.11215507

DO - 10.1109/NEMO62710.2025.11215507

M3 - Conference contribution

AN - SCOPUS:105022607674

T3 - IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings

BT - IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2025 IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025

Y2 - 29 July 2025 through 1 August 2025

ER -

Jin X, Li D, Zhang Y, Deng C. Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications. In IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings. Institute of Electrical and Electronics Engineers Inc. 2025. (IEEE MTT-S International Conference on Numerical Electromagnetic and Multiphysics Modeling and Optimization for RF, Microwave, and Terahertz Applications, NEMO 2025 - Proceedings). doi: 10.1109/NEMO62710.2025.11215507

Compact Active PIFA Antenna Based on Non-Foster Circuit for Mobile Terminal Applications

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