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Design of a low-cost broadband loaded dipole antenna for VHF/UHF frequency range

Bod, M ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1049/iet-map.2018.5753
  3. Publisher: Institution of Engineering and Technology , 2019
  4. Abstract:
  5. This study describes the concept and design of a low-cost super broadband dipole antenna with a passive matching network. The proposed dipole antenna is designed in three steps. First, a simple planar dipole antenna with six different loads and a balanced to unbalanced (Balun) transformer is designed by the genetic algorithm optimisation. The position and value of the loads are optimised to achieve an acceptable radiation pattern and voltage standing wave ratio (VSWR) over the desired frequency bandwidth. In the next step, the shape of the printed strip dipole antenna is optimised to improve the frequency response of the designed antenna. Finally, an LC network is added to the antenna feed point to reduce the antenna VSWR at low frequencies. The final dipole antenna has a length of 1.7 m and can operate over 30–1200 MHz with VSWR 3 and broadside gain >−10 dBi. The proposed antenna can easily be fabricated at a low cost via the printed circuit board technology. An industrial prototype of the proposed antenna is fabricated and measured. A good agreement between measurement and simulation results is observed. © The Institution of Engineering and Technology 2019
  6. Keywords:
  7. Antenna feeders ; Costs ; Directional patterns (antenna) ; Frequency response ; Genetic algorithms ; Microstrip antennas ; Printed circuit boards ; Frequency band width ; Frequency ranges ; Matching networks ; Measurement and simulation ; Printed circuit board technology ; Printed strip dipoles ; Super broadband ; Voltage standing-wave ratio ; Dipole antennas
  8. Source: IET Microwaves, Antennas and Propagation ; Volume 13, Issue 12 , 2019 , Pages 1983-1988 ; 17518725 (ISSN)
  9. URL: https://ieeexplore.ieee.org/abstract/document/8859735