In-Band Full-Duplex Filtering Antenna Arrays Using High-Order Mode Cavity Resonators

Lin, JY; Yang, Y; Wong, SW; Chen, RS

In-Band Full-Duplex Filtering Antenna Arrays Using High-Order Mode Cavity Resonators

Lin, JY Yang, Y

Wong, SW Chen, RS

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Publisher:: Institute of Electrical and Electronics Engineers (IEEE)
Publication Type:: Journal Article
Citation:: IEEE Transactions on Microwave Theory and Techniques, 2022, PP, (99), pp. 1-10
Issue Date:: 2022-01-01

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Field	Value	Language
dc.contributor.author	Lin, JY
dc.contributor.author	Yang, Y https://orcid.org/0000-0001-7439-2156
dc.contributor.author	Wong, SW
dc.contributor.author	Chen, RS
dc.date.accessioned	2023-04-13T03:41:18Z
dc.date.available	2023-04-13T03:41:18Z
dc.date.issued	2022-01-01
dc.identifier.citation	IEEE Transactions on Microwave Theory and Techniques, 2022, PP, (99), pp. 1-10
dc.identifier.issn	0018-9480
dc.identifier.issn	1557-9670
dc.identifier.uri	http://hdl.handle.net/10453/169746
dc.description.abstract	In this article, a series of narrowband and wideband in-band full-duplex (IBFD) filtering antenna arrays (FAAs) using cavity-based high-order modes are investigated. It is found that the pairs of degenerate high-order modes in a single cavity resonator, TM<inline-formula> <tex-math notation="LaTeX">$_{1n0}$</tex-math> </inline-formula> and TM<inline-formula> <tex-math notation="LaTeX">$_{n10}$</tex-math> </inline-formula> (<inline-formula> <tex-math notation="LaTeX">$n$</tex-math> </inline-formula> is even), are suitable for the IBFD FAA designs due to their advantages: 1) in-phase and same amplitude for each magnetic loop, which helps to enhance the gain, and 2) the modal orthogonality, which guarantees the isolation and cross-polarization level between two channels. The higher order response can be achieved by cascading more high-order mode resonators with the required external quality factor (<inline-formula> <tex-math notation="LaTeX">$Q_{e})$</tex-math> </inline-formula> and coupling coefficient (<inline-formula> <tex-math notation="LaTeX">$K)$</tex-math> </inline-formula>. For proof of concept, two types of full-duplex waveguide arrays are implemented and tested. First, a second-order IBFD FAA with 6 <inline-formula> <tex-math notation="LaTeX">$\times$</tex-math> </inline-formula> 5 elements, using a pair of degenerate modes TM<inline-formula> <tex-math notation="LaTeX">$_{610}$</tex-math> </inline-formula> and TM<inline-formula> <tex-math notation="LaTeX">$_{160}$</tex-math> </inline-formula>, is designed with 1% overlapped 10-dB bandwidth and 18.4-dBi realized gain within the passband. The method to improve realized gain and isolation level without increasing any circuit volume is also presented. Second, a fifth-order IBFD FAA using TM<inline-formula> <tex-math notation="LaTeX">$_{410}$</tex-math> </inline-formula> and TM<inline-formula> <tex-math notation="LaTeX">$_{140}$</tex-math> </inline-formula> modes is implemented with an overlapped 10-dB bandwidth of 15.6% and a realized gain of 12.5 dBi. The measured isolation between the two channels is better than 40.4 dB. An excellent agreement between simulated and measured results verifies that the proposed design methodology is feasible for designing high-order mode IBFD FAA.
dc.language	en
dc.publisher	Institute of Electrical and Electronics Engineers (IEEE)
dc.relation	http://purl.org/au-research/grants/arc/LP210300004
dc.relation.ispartof	IEEE Transactions on Microwave Theory and Techniques
dc.relation.isbasedon	10.1109/TMTT.2022.3222219
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0906 Electrical and Electronic Engineering, 1005 Communications Technologies
dc.subject.classification	Networking & Telecommunications
dc.title	In-Band Full-Duplex Filtering Antenna Arrays Using High-Order Mode Cavity Resonators
dc.type	Journal Article
utslib.citation.volume	PP
utslib.for	0906 Electrical and Electronic Engineering
utslib.for	1005 Communications Technologies
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Engineering and Information Technology/School of Electrical and Data Engineering
utslib.copyright.status	closed_access	*
dc.date.updated	2023-04-13T03:41:16Z
pubs.issue	99
pubs.publication-status	Published
pubs.volume	PP
utslib.citation.issue	99

Abstract:

In this article, a series of narrowband and wideband in-band full-duplex (IBFD) filtering antenna arrays (FAAs) using cavity-based high-order modes are investigated. It is found that the pairs of degenerate high-order modes in a single cavity resonator, TM

$_{1n0}$

and TM

$_{n10}$

(

$n$

is even), are suitable for the IBFD FAA designs due to their advantages: 1) in-phase and same amplitude for each magnetic loop, which helps to enhance the gain, and 2) the modal orthogonality, which guarantees the isolation and cross-polarization level between two channels. The higher order response can be achieved by cascading more high-order mode resonators with the required external quality factor (

$Q_{e})$

and coupling coefficient (

$K)$

. For proof of concept, two types of full-duplex waveguide arrays are implemented and tested. First, a second-order IBFD FAA with 6

$\times$

5 elements, using a pair of degenerate modes TM

$_{610}$

and TM

$_{160}$

, is designed with 1% overlapped 10-dB bandwidth and 18.4-dBi realized gain within the passband. The method to improve realized gain and isolation level without increasing any circuit volume is also presented. Second, a fifth-order IBFD FAA using TM

$_{410}$

and TM

$_{140}$

modes is implemented with an overlapped 10-dB bandwidth of 15.6% and a realized gain of 12.5 dBi. The measured isolation between the two channels is better than 40.4 dB. An excellent agreement between simulated and measured results verifies that the proposed design methodology is feasible for designing high-order mode IBFD FAA.

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http://hdl.handle.net/10453/169746