Studies on the effect of mutual coupling on network and resonance properties of broad-wall longitudinal slot antenna

2012 ◽  
Author(s):  
Rintu K. Gayen ◽  
Sushrut Das
Keyword(s):  
Mutual Coupling ◽  
Slot Antenna ◽  
Resonance Properties ◽  
Longitudinal Slot

scholarly journals Quasi-Yagi Slotted Array Antenna with Fan-Beam Characteristics for 28 GHz 5G Mobile Terminals

2020 ◽  
Vol 10 (21) ◽  
pp. 7686
Author(s):  
Sungpeel Kim ◽  
Jaehoon Choi
Keyword(s):  
Mutual Coupling ◽  
Beam Steering ◽  
Ground Plane ◽  
Array Antenna ◽  
Slot Antenna ◽  
Mobile Terminals ◽  
Beam Radiation ◽  
Steering Mechanism ◽  
Half Power ◽  
Beam Characteristics

A quasi-Yagi slotted array antenna with fan-beam characteristics is proposed for 28 GHz 5G mobile terminals. The antenna is composed of a 1 × 8 slot antenna array with directors to enhance the half-power beamwidth (HPBW). The proposed antenna has a fan-beam radiation pattern with a simulated HPBW of 256.72° and a peak gain of 11.16 dBi. In addition, the proposed antenna covers ±48° using a beam steering mechanism. Mutual coupling reduction is achieved by inserting slits between the adjacent slot radiators on the ground plane. The simulated −10 dB reflection coefficient bandwidth of the proposed antenna is 1.79 GHz (27.03–28.82 GHz), and the mutual coupling between each of the slot radiators is lower than −25.02 dB over the 28 GHz target band (27.5–28.35 GHz). To investigate the effect of a human body in a practical environment, the power density was considered to estimate the electromagnetic exposure with a simplified skin model. The measured results were in good agreement with the simulated ones and demonstrated that the proposed antenna could be used for 5G mobile terminals.

scholarly journals Design of Ultra-Wideband MIMO Antenna for Breast Tumor Detection

2012 ◽  
Vol 2012 ◽  
pp. 1-7 ◽  
Author(s):  
Liting Wang ◽  
Bin Huang
Keyword(s):  
Cancer Detection ◽  
Breast Tumor ◽  
Mutual Coupling ◽  
Microstrip Line ◽  
Breast Cancer Detection ◽  
Imaging Systems ◽  
Ultra Wideband ◽  
Slot Antenna ◽  
Mimo Antenna ◽  
Measurement Results

A MIMO antenna composed by microstrip line-fed circular slot antenna is proposed. This antenna is used in ultra-wideband microwave imaging systems aimed for early breast cancer detection. The antenna is designed to operate across the ultra-wideband frequency band in the air. The mutual coupling between the antenna elements has been investigated to be low enough for MIMO medical imaging applications. Both the simulation and measurement results are shown to illustrate the performances of the proposed antenna.

Employing the dumbbell-shaped longitudinal slot antennas in the planar slotted antenna arrays

2021 ◽  
pp. 1-12
Author(s):  
Mahdi Moradian
Keyword(s):  
Antenna Arrays ◽  
Mutual Coupling ◽  
Higher Order ◽  
Slot Antennas ◽  
Higher Order Modes ◽  
Planar Array ◽  
Slotted Antenna ◽  
Simulation Results ◽  
End To End ◽  
Longitudinal Slot

Abstract The dumbbell-shaped longitudinal slot antennas are employed as a replacement for the round-ended longitudinal slot antennas. Each dumbbell-shaped slot is excited by an iris and a septum that have offsets from the waveguide centerlines. All the slots are also cut along the waveguide centerlines. It is demonstrated that the resonant length of the proposed dumbbell-shaped slot antennas is much smaller than the round-ended longitudinal slot antennas. Hence, the end-to-end spacings between the adjacent radiating slots as well as the end-to-end spacings between the coupling and the radiating slots increased noticeably in comparison with the arrays consist of the round-ended longitudinal slot antennas. This fact indicates that one can neglect the mutual coupling between the neighboring slots that are associated with the exciting higher-order modes at the slot positions. To better demonstrate the effectiveness of the proposed dumbbell-shaped slot antennas, a planar array antenna consists of the proposed dumbbell-shaped slot antennas have been designed, implemented, and tested. The measurement and the simulation results confirm the effectiveness of the proposed slot antennas.

scholarly journals Spectral Characteristics of the Double-Folded Slot Antennas with Cold-Electron Bolometers for the 220/240 GHz Channels of the LSPE Instrument

2021 ◽  
Vol 11 (22) ◽  
pp. 10746
Author(s):  
Leonid S. Revin ◽  
Dmitry A. Pimanov ◽  
Anton V. Blagodatkin ◽  
Anna V. Gordeeva ◽  
Andrey L. Pankratov ◽  
...  
Keyword(s):  
High Temperature ◽  
Theoretical Study ◽  
Spectral Characteristics ◽  
Absorption Efficiency ◽  
Slot Antenna ◽  
Cold Electron ◽  
Slot Antennas ◽  
Coplanar Line ◽  
Resonance Properties ◽  
To Receive

We present the results of the experimental and theoretical study of the resonant properties and noise of a single cell of a receiving system based on cold-electron bolometers (CEB) with a double-folded slot antenna and coplanar lines. The system was designed to receive signals at 220/240 GHz frequencies with a 5% bandwidth. In measurements, we used the samples of the double-folded slot antennas with slot lengths of 162 um and coplanar line lengths from 185 to 360 um. Measurements of the resonance properties of CEB located at 0.3 K cryostat plate were carried out using a generator based on a high-temperature YBCO Josephson junction located inside the same cryostat at 4 K plate. This arrangement made it possible to obtain smooth amplitude-frequency characteristics with a clearly defined peak of a 15–21 GHz bandwidth at different frequencies. Based on these results, 2-D array of double-folded slot antennas with CEBs as 220/240 GHz LSPE channel prototype was calculated.The absorption efficiency of the array has reached 81% and 77% for 220 and 240 GHz channels, respectively.

scholarly journals A Slot Antenna Array With Low Mutual Coupling for Use on Small Mobile Terminals

2011 ◽  
Vol 59 (5) ◽  
pp. 1512-1520 ◽  
Author(s):  
Sema Dumanli ◽  
Chris J. Railton ◽  
Dominique L. Paul
Keyword(s):  
Antenna Array ◽  
Mutual Coupling ◽  
Slot Antenna ◽  
Mobile Terminals
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