Design of compact reconfigurable ultra-wideband slot antenna with switchable single/dual band notch functions

• Published in: IET microwaves, antennas & propagation Vol. 8; no. 8; pp. 541 - 548
• Main Authors: Badamchi, Bahareh, Nourinia, Javad, Ghobadi, Changiz, Valizade Shahmirzadi, Arash
• Format: Journal Article
• Language: English
• Published: Stevenage The Institution of Engineering and Technology 01.06.2014; Institution of Engineering and Technology; The Institution of Engineering & Technology
• Subjects: antenna performance; Antennas; Applied sciences; Band spectra; Circuit properties; compact reconfigurable microstrip slot antenna; compact reconfigurable ultra‐wideband slot antenna; C‐band spectrum; Electric, optical and optoelectronic circuits; Electronic circuits; Electronics; Exact sciences and technology; frequency 3.15 GHz to 3.85 GHz; frequency 5.43 GHz to 6.1 GHz; Frequency filters; Interoperability; Local area networks; microwave antennas; Microwave circuits, microwave integrated circuits, microwave transmission lines, submillimeter wave circuits; multifrequency antennas; Notches; PIN diodes; p‐i‐n diodes; radiating patch; Radiocommunications; Slot antennas; switchable single and dual band notch functions; Telecommunications; Telecommunications and information theory; ultra wideband antennas; ultra‐wideband applications; UWB frequency band interference; UWB spectrum coverage; WiMax; WiMAX spectrum; Wireless communication; wireless LAN; wireless local area network band; Wireless networks; p-i-n diodes; wireless local area network band; microwave antennas; radiating patch; ultra wideband antennas; compact reconfigurable microstrip slot antenna; antenna performance; WiMax; PIN diodes; frequency 5.43 GHz to 6.1 GHz; switchable single and dual band notch functions; WiMAX spectrum; slot antennas; ultra-wideband applications; UWB spectrum coverage; compact reconfigurable ultra-wideband slot antenna; multifrequency antennas; C-band spectrum; frequency 3.15 GHz to 3.85 GHz; wireless LAN; UWB frequency band interference; Performance evaluation; Wireless LAN; On line; Wireless telecommunication; Centimetric wave; Compact design; Coverage; Broadband antennas; Ultra wide band; Multi-band circuit; Notch filter; Engraving; Slot antenna; Microstrip antennas; C band; On line processing; Radiation pattern; Reconfigurable architectures; Long distance transmission; p i n diode; Radio communication; High rate transmission
• ISSN: 1751-8725; 1751-8733
• DOI: 10.1049/iet-map.2013.0311

A compact reconfigurable microstrip slot antenna with switchable single and dual band notch functions for ultra-wideband (UWB) applications is presented in this study. In the proposed structure, an additional resonance is excited by etching two symmetrical notches on the feed-line and thereby a UWB characteristic is obtained. Then, by cutting two slots on the radiating patch and embedding two positive-intrinsic-negative (PIN) diodes along these slots, switchable single and dual band notch performances are added to the antenna performance. By changing the bias states of the PIN diodes, the antenna is capable of exhibiting four different performances of UWB spectrum coverage, UWB coverage with single rejection of the wireless local area network (WLAN) band, UWB coverage with single rejection of the WiMAX and C-band spectrum, and UWB coverage with dual band notch function at the WLAN, the WiMAX and the C-band frequencies. Good agreement between the simulated and the measured results is achieved at different performances of the antenna. The designed antenna has a small size of 20 × 20 mm2 and the measured results reveal that the fabricated antenna has good radiation behaviour in the UWB frequency spectrum with switchable band notch functions at 3.15–3.85 and 5.43–6.1 GHz which can eliminate the UWB frequency band interference with the WiMAX, the C-band and the WLAN systems.