scholarly journals Frequency tuning varactor-loaded reconfigurable antenna for m-WiMAX and WLAN applications

2019 ◽  
Vol 13 (2) ◽  
pp. 779
Author(s):  
S. M. Shah ◽  
K. Hamdan ◽  
Z. Z. Abidin ◽  
F. C. Seman ◽  
S. A. Hamzah ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Frequency Tuning ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Reconfigurable Antenna ◽  
Resonant Frequencies ◽  
Varactor Diode ◽  
Microstrip Patch ◽  
Tunable Device ◽  
Tan Δ

A design approach for a microstrip patch antenna to achieve the reconfigurable dual-band operation with a tunable device is presented in this work. The approach uses a BB833 varactor diode in the middle of a slotted patch antenna which which is able to produce dual-band resonant frequencies. The reconfigurable antenna is designed and simulated in CST Microwave Studio® software and is later, fabricated on a FR-4 substrate with a dielectric constant,  of 4.5, loss tangent, tan δ of 0.019 and thickness, h of 1.6 mm. By changing the DC voltages of the varactor diode, different capacitance values of the varactor diode are obtained which dictate the specific resonant frequencies. From the simulation results, the capacitance value of 0.5 pF with a bias voltage of 2.0 V is chosen as it produces the required dual-band resonant frequencies at 3.38 GHz and 5.37 GHz for desired applications in the m-WiMAX and WLAN bands.

A Frequency and Polarization Reconfigurable Dual-Patch Microstrip A Frequency and Polarization Reconfigurable Dual-Patch Microstrip

2021 ◽  
Vol 36 (2) ◽  
pp. 152-158
Author(s):  
Cong Bui ◽  
Thanh Dang ◽  
Minh Doan ◽  
Truong Nguyen
Keyword(s):  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Antenna Design ◽  
Reconfigurable Antenna ◽  
Pin Diode ◽  
Varactor Diode ◽  
Ism Band ◽  
Microstrip Patch ◽  
Antenna Performance ◽  
Good Agreement

This paper proposes a reconfigurable microstrip patch antenna design for wireless ISM band applications. The antenna simultaneously uses PIN Diodes to switch between linear and circular polarization at 2.45 GHz and uses Varactor Diode to continuously tune the operating frequency from 1.73 GHz to 2.45 GHz. The antenna performance is characterized as a combination of ON/OFF state of PIN Diode and a bias voltage of Varactor Diode varying from 0.8V to 10V. A good agreement between simulation and measurement is obtained which validates the proposed method. The proposed frequency/polarization reconfigurable antenna is promising for various applications in wireless ISM band such as DCS (1710 – 1880 MHz), PCS (1850 – 1990 MHz), GSM 1800, GSM 1900, UMTS (1920 – 2170 MHz) and WiFi/Bluetooth (2.4 – 2.5 GHz).

scholarly journals Dual-band Rectangular Microstrip Patch Antenna for LTE and BWA Application

2018 ◽  
Vol 434 ◽  
pp. 012211 ◽  
Author(s):  
N Ismail ◽  
F Oktafiani ◽  
F Makmur ◽  
F D Ramadhan ◽  
M A Ramdhani ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Microstrip Patch Antenna ◽  
Dual Band ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna

scholarly journals Analysis of substrateintegrated frequency selective surface antenna for IoT applications

2020 ◽  
Vol 18 (2) ◽  
pp. 875
Author(s):  
Govardhani Immadi ◽  
M. Venkata Narayana ◽  
A. Navya ◽  
C. Anudeep Varma ◽  
A. Abhishek Reddy ◽  
...  
Keyword(s):  
Patch Antenna ◽  
Low Cost ◽  
Frequency Selective Surface ◽  
Microstrip Patch Antenna ◽  
Iot Applications ◽  
The Past ◽  
Microstrip Patch ◽  
Rectangular Microstrip Patch Antenna ◽  
Frequency Selective ◽  
Tan Δ

<p>Antennas are long used for communication of data since a century and their usage has been diversified over the past two decades and the antennas also entered the domain of medical fields. A rectangular microstrip patch antenna has been designed on a substrate integrated waveguide with frequency selective surface which is in the shape of a square. The design of this antenna with SIW are done by using CST on a low cost FR4 substrate where є<sub>r</sub> =4.4, h=1.58 mm and tan δ=0.0035. The SIW structure merit is utilized on the traditional FSS is simulated and verified by using CST.</p>

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