Miniaturization of ESPAR antenna using folded monopoles and conical central element
- Resource Type
- Conference
- Authors
- Kausar, Shaafq; Rahman, Hamood Ur; Hassan, Tayyab; Kausar, Ahmed
- Source
- 2015 International Conference on Radar, Antenna, Microwave, Electronics and Telecommunications (ICRAMET) Radar, Antenna, Microwave, Electronics, and Telecommunications (ICRAMET), 2015 International Conference on. :87-91 Oct, 2015
- Subject
- Communication, Networking and Broadcast Technologies
Components, Circuits, Devices and Systems
Fields, Waves and Electromagnetics
Photonics and Electrooptics
Signal Processing and Analysis
Radar antennas
Microwave antennas
Radar
Telecommunications
ESPAR
folded monopole
gain
smart antenna
bandwidth
- Language
Miniaturized Electronically Steerable Array Radiator (ESPAR) antenna with folded parasitic monopoles and conical central element is proposed. ESPAR antenna is able to cover a bandwidth from 2.35GHz to 2.55GHz. Folded monopole structure with conical central element is employed to reduce the size of antenna. Height of antenna monopoles is reduced to 1/12 wavelength and its radius is reduced to 1/4 wavelength, making it three times smaller than conventional ESPAR antenna. Central element is made conical to improve bandwidth and return loss. In spite of its compactness antenna achieves gain of 7dBi and return loss of −25dB at designed frequency of 2.45GHz. Antenna main beam can be steered in the horizontal plane across a range from 0–360 degrees by opening shorting parasitic elements. The proposed ESPAR antenna has compact size, beam steering ability and in spite of its compactness antenna achieves almost the same gain as that of standard ESPAR antenna.