scholarly journals Simple Design Procedure of a Broadband Circularly Polarized Slot Monopole Antenna Assisted by Characteristic Mode Analysis

IEEE Access ◽  
2018 ◽  
Vol 6 ◽  
pp. 78386-78393 ◽  
Author(s):  
Huy Hung Tran ◽  
Nghia Nguyen-Trong ◽  
Amin M. Abbosh
Keyword(s):  
Design Procedure ◽  
Monopole Antenna ◽  
Mode Analysis ◽  
Simple Design ◽  
Characteristic Mode ◽  
Circularly Polarized

Circularly Polarized RFID Tag Antenna Design for Metallic Poles Using Characteristic Mode Analysis

2019 ◽  
Vol 18 (7) ◽  
pp. 1327-1331 ◽  
Author(s):  
Yi Yan ◽  
Jun Ouyang ◽  
Xiao Ma ◽  
Rui Wang ◽  
Abubakar Sharif
Keyword(s):  
Antenna Design ◽  
Mode Analysis ◽  
Characteristic Mode ◽  
Rfid Tag ◽  
Circularly Polarized

scholarly journals Large Screen Enabled Tri-port MIMO Handset Antenna for Low LTE Bands

2020 ◽  
Author(s):  
Hanieh Aliakbari ◽  
Liying Nie ◽  
Buon Kiong Lau
Keyword(s):  
Design Procedure ◽  
Mode Analysis ◽  
Total Efficiency ◽  
Characteristic Mode ◽  
Large Screen ◽  
Antenna Performance ◽  
Resonant Modes ◽  
Metal Plates ◽  
Measurement Results ◽  
Port Design

In recent years, the screen-to-body ratio of mobile handsets has been increasing. Today, the screen nearly fills up the entire front side. Conventionally, the screen is mainly seen as a metallic object that adversely affects antenna performance. In this paper, the large screen is used for the first time to facilitate an additional uncorrelated MIMO port in a tri-port design, for several LTE bands below 1 GHz. To this end, the design procedure explicitly considers the screen together with the terminal chassis, which can be simply modelled as two metal plates. In particular, characteristic mode analysis of the double-plate model enables a sufficient number of resonant modes to be created, tuned and selectively excited to yield three uncorrelated MIMO ports in the low band. Simulation and measurement results are found to be in good agreement. The measured bandwidths of the three ports are 23%, 17% and 21%, respectively. Within the operating band, the measured isolation is above 13 dB, envelope correlation coefficient below 0.16 and average total efficiency above 72%.

scholarly journals Large Screen Enabled Tri-port MIMO Handset Antenna for Low LTE Bands

2020 ◽  
Author(s):  
Hanieh Aliakbari ◽  
Liying Nie ◽  
Buon Kiong Lau
Keyword(s):  
Design Procedure ◽  
Mode Analysis ◽  
Total Efficiency ◽  
Characteristic Mode ◽  
Large Screen ◽  
Antenna Performance ◽  
Resonant Modes ◽  
Metal Plates ◽  
Measurement Results ◽  
Port Design

In recent years, the screen-to-body ratio of mobile handsets has been increasing. Today, the screen nearly fills up the entire front side. Conventionally, the screen is mainly seen as a metallic object that adversely affects antenna performance. In this paper, the large screen is used for the first time to facilitate an additional uncorrelated MIMO port in a tri-port design, for several LTE bands below 1 GHz. To this end, the design procedure explicitly considers the screen together with the terminal chassis, which can be simply modelled as two metal plates. In particular, characteristic mode analysis of the double-plate model enables a sufficient number of resonant modes to be created, tuned and selectively excited to yield three uncorrelated MIMO ports in the low band. Simulation and measurement results are found to be in good agreement. The measured bandwidths of the three ports are 23%, 17% and 21%, respectively. Within the operating band, the measured isolation is above 13 dB, envelope correlation coefficient below 0.16 and average total efficiency above 72%.

Characteristic mode-based compact circularly polarized metasurface antenna for in-band RCS reduction

2019 ◽  
Vol 12 (2) ◽  
pp. 131-137
Author(s):  
Puneeth Kumar Rajanna ◽  
Karthik Rudramuni ◽  
Krishnamoorthy Kandasamy
Keyword(s):  
Satellite Communication ◽  
Axial Ratio ◽  
Slot Antenna ◽  
Mode Analysis ◽  
Impedance Bandwidth ◽  
Compact Structure ◽  
Characteristic Mode ◽  
Circularly Polarized ◽  
Rectangular Patch ◽  
Full Wave Analysis

AbstractThis paper presents a novel design of a low profile circularly polarized (CP) metasurface (MTS) antenna with in-band radar cross-section (RCS) reduction property. The MTS is loaded as a superstrate on slot antenna and it can be viewed as a polarization-dependent MTS (PDMTS). The rectangular patch-based PDMTS is analyzed using characteristic mode analysis to find two orthogonal degenerate modes, which produces CP waves. Linearly polarized slot antenna is used to excite the PDMTS. The performance of PDMTS loaded slot antenna is analyzed numerically using full-wave analysis method. The PDMTS CP antenna is fabricated and its performance is tested experimentally. The proposed antenna has a compact structure and it has an overall size of $0.52{\lambda _0}\times 0.52{\lambda _0} \times 0.078{\lambda _0}$ (where ${\lambda _0}$ is the free space wavelength). The measured results show that the PDMTS antenna achieves $-10\,{\rm dB}$ impedance bandwidth of 29.41$\%$, 3-dB axial ratio bandwidth of 9.05$\%$, broadside gain of 6.34 dB, and monostatic RCS reduction of $-30.2\,{\rm dBsm}$ at the resonant frequency of 5.86 GHz. The simulated results are in well agreement with the measured results and it is well suited for C-band Radar and Satellite communication.

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