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A Differential UWB Quasi-Yagi Antenna with A Reconfigurable Notched Band

  • Feng Wei EMAIL logo , Xin Tong Zou , Xin Yi Wang , Bin Li and Xi Bei Zhao
Published/Copyright: May 23, 2018
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Abstract

A compact differential ultra-wide band (UWB) planar quasi-Yagi antenna is presented in this paper. The proposed antenna consists of a balanced stepped-impedance microstrip-slotline transition structure, a driver dipole and one parasitic strip. A wide differential-mode (DM) impedance bandwidth covering from 3.8 to 9.5 GHz is realized. Meanwhile, a high and wideband common-mode (CM) suppression can be achieved by employing the balanced stepped-impedance microstrip-slotline transition structure. It is noted that the DM passband is independent from the CM response, which can significantly simplify the design procedure. In addition, a reconfigurable sharp DM notched band from 5.6 to 6.7 GHz is generated by adding one pair of quarter-wavelength varactor-loaded short-circuited stubs adjacent to the microstrip line symmetrically. In order to illustrate the effectiveness of the design, two prototypes of the antennas are designed, fabricated, and measured. A good agreement between the simulated and measured results is observed.

Funding statement: National Natural Science Foundation of China (NSFC), Funder Id:, Grant Number: 61771055 and 61405152

Acknowledgements

This work was supported by the National Natural Science Foundation of China (NSFC) (grants 61771055 and 61405152), the Key Laboratory for Research of Design and Electromagnetic Compatibility of High Speed Electronic Systems, Ministry of Education, Basic Research Foundation of Beijing Institute of Technology (grant 20170542009) and the Fundamental Research Funds for the Central Universities (grant JB180204).

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Received: 2018-01-12
Published Online: 2018-05-23
Published in Print: 2018-08-28

© 2018 Walter de Gruyter GmbH, Berlin/Boston

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