Reconfigurable UWB antenna with electrically control for triple on‐demand rejection bandwidth

Abstract

A varactor diode reconfigurable ultra‐wideband antenna that with electrically controlling the rejects on‐demand WiMAX, WLAN, and C‐BAND signals in the entire 3.1–10.3 GHz range is presented. The antenna design, embedding the active devices, integration with the varactor diode, and biasing network are described. A method to vary the rejection on‐demanded bandwidth is also provided. The fabrication prototype is conformal and double‐sided. Results indicate a successful integration and minimal interference of the varactor diode voltage and biasing circuitry with the antenna, paving the road for more integrated reconfigurable antenna on communication systems using active devices technology. © 2015 Wiley Periodicals, Inc. Microwave Opt Technol Lett 57:1894–1897, 2015

Compact Planar Ultrawideband Antennas With Continuously Tunable, Independent Band-Notched Filters

“…This strategy has been accomplished successfully by integrating ON/OFF switch-type active elements, such as p-i-n diodes [8][9][10][11][12][13][14][15], micro-electromechanical system (MEMS) switches [16][17], shorting circuits [18], stepper motors [19], and optically controlled microwave switches (OCMSs) [20][21], into these UWB antennas. On the other hand, embedding continuously tunable voltage or current elements, for instance, varactors [22][23][24][25][26][27][28][29][30][31][32][33], into similar UWB antennas empowers one's ability to continuously tune their band-notch frequency windows.…”

Ompact CPW Fed Switchable Uwb Antenna as an Antenna Filter at Narrow-Frequency Bands

“…In this regard, various tunable band-notched UWB antennas have been reported over the last decade [14][15][16][17][18][19][20][21][22][23]. These UWB antennas actually implement the strategy of PIN diodes, shorting circuits, microelectromechanical switches (MEMS), stepper motors, and optically controlled switching techniques.…”

“…Also, their switching technique is based on conventional ON and OFF statuses. Similarly, in [22] they embed tunable voltage and current elements (varactors) to continuously tune the stopbands. However, the reported antenna only operates at fixed notched band which can be turned ON and OFF using the status of the switch.…”

Uwb Antenna With Reconfigurable Triple Band Notched Characteristics for Cognitive Radio

“…Varactors diodes are used to tune the position of notch bands [15][16] by changing the capacitance value of varactor diode using applied voltage and MEMS are utilized to lower DC power consumption and fast switching time but has fabrication complexity as compared to pin diode and varactor diode [17][18]. The proposed work uses the slot technique to design compact reconfigurable triple band rejection antenna with bandwidth more than the ultra-wideband.…”