Mode-Counteraction Based Self-Decoupling in Circularly Polarized MIMO Microstrip Patch Array

A mode-counteraction-based self-decoupling method is proposed for the circularly polarized (CP) multi-input multi-output (MIMO) microstrip patch antenna (MPA) array. The array simply consists of two identical diagonal-fed rectangular MPAs, without any extra decoupling structure. It is found that by...

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Published inIEEE transactions on antennas and propagation Vol. 70; no. 10; pp. 9337 - 9346
Main Authors Lai, Qi Xuan, Pan, Yong Mei, Zheng, Shao Yong
Format Journal Article
LanguageEnglish
Published New York IEEE 01.10.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Antenna arrays
Circular polarization
Circularly polarized (CP) antenna
Couplings
Decoupling method
Feeding
Microstrip
Microstrip antenna arrays
microstrip patch antenna (MPA)
MIMO communication
multi-input multi-output (MIMO) antenna
Mutual coupling
Patch antennas
Probes
self-decoupling
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Abstract A mode-counteraction-based self-decoupling method is proposed for the circularly polarized (CP) multi-input multi-output (MIMO) microstrip patch antenna (MPA) array. The array simply consists of two identical diagonal-fed rectangular MPAs, without any extra decoupling structure. It is found that by properly adjusting the patch dimensions and feeding positions, the orthogonal TM1, 0 and TM0, 1 modes can be simultaneously excited in the active MPA to generate the CP field. Meanwhile, the coupled <inline-formula> <tex-math notation="LaTeX">E </tex-math></inline-formula>-fields of the two modes in the adjacent passive MPA can counteract each other, generating a null-field region. When the feeding probe of the passive MPA is placed within the null-field region, no signal can be received at the port, and consequently, an extremely low mutual coupling of −59.4 dB is achieved, without scarifying any other radiation performance of the MPA. In addition, this self-decoupling method is also applicable to other types of MPA arrays and four-element MPA arrays, exhibiting great versatility and extensibility.
AbstractList A mode-counteraction-based self-decoupling method is proposed for the circularly polarized (CP) multi-input multi-output (MIMO) microstrip patch antenna (MPA) array. The array simply consists of two identical diagonal-fed rectangular MPAs, without any extra decoupling structure. It is found that by properly adjusting the patch dimensions and feeding positions, the orthogonal TM1, 0 and TM0, 1 modes can be simultaneously excited in the active MPA to generate the CP field. Meanwhile, the coupled [Formula Omitted]-fields of the two modes in the adjacent passive MPA can counteract each other, generating a null-field region. When the feeding probe of the passive MPA is placed within the null-field region, no signal can be received at the port, and consequently, an extremely low mutual coupling of −59.4 dB is achieved, without scarifying any other radiation performance of the MPA. In addition, this self-decoupling method is also applicable to other types of MPA arrays and four-element MPA arrays, exhibiting great versatility and extensibility.
A mode-counteraction-based self-decoupling method is proposed for the circularly polarized (CP) multi-input multi-output (MIMO) microstrip patch antenna (MPA) array. The array simply consists of two identical diagonal-fed rectangular MPAs, without any extra decoupling structure. It is found that by properly adjusting the patch dimensions and feeding positions, the orthogonal TM1, 0 and TM0, 1 modes can be simultaneously excited in the active MPA to generate the CP field. Meanwhile, the coupled <inline-formula> <tex-math notation="LaTeX">E </tex-math></inline-formula>-fields of the two modes in the adjacent passive MPA can counteract each other, generating a null-field region. When the feeding probe of the passive MPA is placed within the null-field region, no signal can be received at the port, and consequently, an extremely low mutual coupling of −59.4 dB is achieved, without scarifying any other radiation performance of the MPA. In addition, this self-decoupling method is also applicable to other types of MPA arrays and four-element MPA arrays, exhibiting great versatility and extensibility.
Author Zheng, Shao Yong
Pan, Yong Mei
Lai, Qi Xuan
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SubjectTerms Antenna arrays
Circular polarization
Circularly polarized (CP) antenna
Couplings
Decoupling method
Feeding
Microstrip
Microstrip antenna arrays
microstrip patch antenna (MPA)
MIMO communication
multi-input multi-output (MIMO) antenna
Mutual coupling
Patch antennas
Probes
self-decoupling
Title Mode-Counteraction Based Self-Decoupling in Circularly Polarized MIMO Microstrip Patch Array
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