Investigations on frequency agile microstrip patch antenna loaded with varactor diode

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).

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Frequency Agile Microstrip Patch Antenna Using an Anisotropic Artificial Dielectric Layer (AADL): Modeling and Design

IEEE Access ◽

10.1109/access.2019.2962160 ◽

2020 ◽

Vol 8 ◽

pp. 6398-6406 ◽

Cited By ~ 2

Author(s):

Jorge L. Salazar-Cerreno ◽

Zeeshan Qamar ◽

Shahrokh Saeedi ◽

Binbin Weng ◽

Hjalti S. Sigmarsson

Keyword(s):

Patch Antenna ◽

Dielectric Layer ◽

Microstrip Patch Antenna ◽

Microstrip Patch ◽

Artificial Dielectric ◽

Frequency Agile

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Compact single‐varactor diode frequency‐reconfigurable microstrip patch antenna

IET Microwaves Antennas & Propagation ◽

10.1049/mia2.12117 ◽

2021 ◽

Author(s):

Mahmoud Al Ahmad ◽

Saifudeen Kabeer ◽

Ala Abu Sanad ◽

Lillian J. A. Olule

Keyword(s):

Patch Antenna ◽

Microstrip Patch Antenna ◽

Varactor Diode ◽

Microstrip Patch

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

Indonesian Journal of Electrical Engineering and Computer Science ◽

10.11591/ijeecs.v13.i2.pp779-786 ◽

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.

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