A Beamforming Approach for Multiport Antennas [Antenna Applications Corner]

2018 ◽  
Vol 60 (2) ◽  
pp. 96-104 ◽  
Author(s):  
Jonathan J. Lynch
Keyword(s):  
Multiport Antennas

scholarly journals Q-factor for Multiport Antennas and Achievable Bandwidth Estimation

2021 ◽  
pp. 1-1
Author(s):  
Rasmus Luomaniemi ◽  
Pasi Yla-Oijala ◽  
Anu Lehtovuori ◽  
Ville Viikari
Keyword(s):  
Bandwidth Estimation ◽  
Q Factor ◽  
Multiport Antennas

A Closed-Form Formula of Radiation and Total Efficiency for Lossy Multiport Antennas

2019 ◽  
Vol 18 (12) ◽  
pp. 2468-2472
Author(s):  
Min Wang ◽  
Tian-Hong Loh ◽  
Yongjiu Zhao ◽  
Qian Xu
Keyword(s):  
Closed Form ◽  
Total Efficiency ◽  
Closed Form Formula ◽  
Multiport Antennas

Impedance and quality factor of mutually coupled multiport antennas

2008 ◽  
Vol 50 (8) ◽  
pp. 2034-2039
Author(s):  
Johan C.-E. Sten ◽  
Mervi Hirvonen
Keyword(s):  
Quality Factor ◽  
Multiport Antennas

scholarly journals A Modal Description of Multiport Antennas

2011 ◽  
Vol 2011 ◽  
pp. 1-12 ◽  
Author(s):  
Jonathan J. Lynch
Keyword(s):  
Antenna Array ◽  
Power Flow ◽  
Mutual Coupling ◽  
Scattering Matrix ◽  
Effective Area ◽  
Close Connection ◽  
Input Output ◽  
Straightforward Manner ◽  
Modal Description ◽  
Multiport Antennas

This paper presents a modal description of multiport antennas that leads directly to a rigorous network representation and simple quadratic expressions for gain, efficiency, and effective area. The analysis shows that the transmitting and receiving properties of an element antenna array are exactly described by a element scattering matrix together with a set of orthonormal mode functions and accounts for effects such as mutual coupling, scattering, reflection, and losses. The approach is quite general, only requiring that the antenna be finite and reciprocal. The scattering network description simplifies accounting of power flow while retaining a close connection to the physical antenna characteristics. The orthonormal mode functions provide a complete basis for radiated and received fields, facilitating beamforming. The theory provides rigorous definitions of input-output signals and links them to the underlying electromagnetics in a straightforward manner.

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