U-Slot Patch Antenna Principle and Design Methodology Using Characteristic Mode Analysis and Coupled Mode Theory
Abstract
Patch antennas incorporating a U-shaped slot are well-known to have relatively large (about 30%) impedance bandwidths. This work uses characteristic mode analysis (CMA) to explain the impedance behavior of a classic U-slot patch geometry in terms of coupled mode theory and shows the relevant modes are in-phase and anti-phase coupled modes whose resonant frequencies are governed by coupled mode theory. Additional analysis shows that one uncoupled resonator is the conventional TM 01 patch mode and the other is a lumped LC resonator involving the slot and the probe. An equivalent circuit model for the antenna is given wherein element values are extracted from CMA data and which explicitly demonstrates coupling between these two resonators. The circuit model approximately reproduces the impedance locus of the driven simulation. A design methodology based on coupled mode theory and guided by CMA is presented that allows wideband U-slot patch geometries to be designed quickly and efficiently. The methodology is illustrated through example.
- Publication Date:
- Research Org.:
- Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1839825
- Alternate Identifier(s):
- OSTI ID: 1559482; OSTI ID: 1861176
- Report Number(s):
- SAND-2019-6034J
Journal ID: ISSN 2169-3536; 8787772
- Grant/Contract Number:
- NA0003525; AC04-94AL85000
- Resource Type:
- Published Article
- Journal Name:
- IEEE Access
- Additional Journal Information:
- Journal Name: IEEE Access Journal Volume: 7; Journal ID: ISSN 2169-3536
- Publisher:
- Institute of Electrical and Electronics Engineers
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 47 OTHER INSTRUMENTATION; antenna; U-slot patch antenna; U-slot antenna; broadband antenna; wideband antenna; microstrip antenna; patch antenna; characteristic mode analysis; coupled mode theory
Citation Formats
Borchardt, John J., and Lapointe, Tyler C. U-Slot Patch Antenna Principle and Design Methodology Using Characteristic Mode Analysis and Coupled Mode Theory. United States: N. p., 2019.
Web. doi:10.1109/ACCESS.2019.2933175.
Borchardt, John J., & Lapointe, Tyler C. U-Slot Patch Antenna Principle and Design Methodology Using Characteristic Mode Analysis and Coupled Mode Theory. United States. https://doi.org/10.1109/ACCESS.2019.2933175
Borchardt, John J., and Lapointe, Tyler C. Tue .
"U-Slot Patch Antenna Principle and Design Methodology Using Characteristic Mode Analysis and Coupled Mode Theory". United States. https://doi.org/10.1109/ACCESS.2019.2933175.
@article{osti_1839825,
title = {U-Slot Patch Antenna Principle and Design Methodology Using Characteristic Mode Analysis and Coupled Mode Theory},
author = {Borchardt, John J. and Lapointe, Tyler C.},
abstractNote = {Patch antennas incorporating a U-shaped slot are well-known to have relatively large (about 30%) impedance bandwidths. This work uses characteristic mode analysis (CMA) to explain the impedance behavior of a classic U-slot patch geometry in terms of coupled mode theory and shows the relevant modes are in-phase and anti-phase coupled modes whose resonant frequencies are governed by coupled mode theory. Additional analysis shows that one uncoupled resonator is the conventional TM 01 patch mode and the other is a lumped LC resonator involving the slot and the probe. An equivalent circuit model for the antenna is given wherein element values are extracted from CMA data and which explicitly demonstrates coupling between these two resonators. The circuit model approximately reproduces the impedance locus of the driven simulation. A design methodology based on coupled mode theory and guided by CMA is presented that allows wideband U-slot patch geometries to be designed quickly and efficiently. The methodology is illustrated through example.},
doi = {10.1109/ACCESS.2019.2933175},
journal = {IEEE Access},
number = ,
volume = 7,
place = {United States},
year = {Tue Jan 01 00:00:00 EST 2019},
month = {Tue Jan 01 00:00:00 EST 2019}
}
https://doi.org/10.1109/ACCESS.2019.2933175
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