Results 301 to 310 of about 5,014,271 (379)

Frequency-Reconfigurable Dielectric Patch Antenna With Bandwidth Enhancement

IEEE Transactions on Antennas and Propagation, 2022
A frequency-reconfigurable bandwidth-enhanced dielectric patch antenna is investigated in this article. The modified feeding structure and air tunnel are introduced to incorporate the TM10 mode and antiphase TM20 mode, thereby expanding the antenna ...
Shi‐Chang Tang, Xue-Ying Wang, S. Zheng, Y. Pan, Jian‐Xin Chen   +4 more
semanticscholar   +1 more source

A Transmissive Frequency-Reconfigurable Cross-Polarization Conversion Surface

IEEE Antennas and Wireless Propagation Letters, 2022
A transmissive frequency-reconfigurable cross-pola- rization conversion surface is presented. First, two static cross-polarization conversion unit cells are proposed. Results indicate that they are both capable of transforming incoming linearly polarized
P. Fei, Weihua Guo, Wei-Long Hu, Qingqing Zheng, Xin Wen, Xing Chen, G. Vandenbosch   +6 more
semanticscholar   +1 more source

Frequency-Reconfigurable Circularly Polarized Omnidirectional Antenna

IEEE Transactions on Antennas and Propagation, 2022
A concept of frequency-reconfigurable circularly polarized (CP) antenna with omnidirectional radiation characteristics is introduced. The antenna is based on a center-fed circular patch with shorting vias, surrounded by three arc-shaped arms ...
K. Paramayudha, S. J. Chen, W. Withayachumnankul, C. Fumeaux   +3 more
semanticscholar   +1 more source

Flexible force sensitive frequency reconfigurable antenna base on stretchable conductive fabric

Journal of Physics D: Applied Physics, 2022
With the development of wireless technology and flexible electronics, flexible frequency reconfigurable antennas have been directly used as sensors to detect mechanical signals.
Li Shao, Xinyue Tang, Yujie Yang, Dacheng Wei, Yuanchang Lin, Guotian He, Dapeng Wei   +6 more
semanticscholar   +1 more source

A Frequency-Reconfigurable Wearable Textile Antenna With One-Octave Tuning Range

IEEE Transactions on Antennas and Propagation, 2021
A reconfigurable wearable textile antenna with wide frequency tuning range is demonstrated in this work. Frequency agility is realized by adding a coplanar reconfiguration module to a planar inverted-F antenna (PIFA) constructed in textile technology ...
Quoc Hung Dang, S. J. Chen, D. Ranasinghe, C. Fumeaux   +3 more
semanticscholar   +1 more source

Frequency-Reconfigurable Input-Reflectionless Bandpass Filter and Filtering Power Divider With Constant Absolute Bandwidth

IEEE Transactions on Circuits and Systems - II - Express Briefs, 2021
An RF input-quasi-reflectionless bandpass filter (BPF) with reconfigurable center frequency and constant absolute bandwidth (ABW) is presented. The proposed BPF is based on a tunable complementary-diplexer architecture, which is made up of a main ...
Maoyu Fan, K. Song, Li Yang, R. Gómez‐García   +3 more
semanticscholar   +1 more source

PIFA frequency reconfigurable antenna

2014 IEEE Antennas and Propagation Society International Symposium (APSURSI), 2014
A design of frequency reconfigurable PIFA antenna is presented in this paper. The antenna consists of halves of three concentric rectangular patches. Five RF PIN diodes are inserted in proper locations for frequency reconfigurability. Four switching cases are considered. The first case (all switches are ON) results in a single-band operation at 850 MHz
M. Abou Al-alaa, Hala A. Elsadek, Esmat A. Abdallah, E. A. Hashish   +3 more
openaire   +1 more source

A High-Efficiency Wideband Frequency-Reconfigurable Water Antenna With a Liquid Control System: Usage for VHF and UHF Applications

IEEE Antennas & Propagation Magazine, 2021
A distilled water dielectric resonator antenna (DRA) with a wide frequency-tuning range and high efficiency is presented in this article. It consists of a water resonator and a ground plane with a wideband bowtie feeding slot. The water resonator, having
Lei Xing, Qian Xu, Jiajia Zhu, Yongjiu Zhao, S. Alja'afreh, Chaoyun Song, Yi Huang   +6 more
semanticscholar   +1 more source

Frequency-Reconfigurable Monopole Antennas

IEEE Transactions on Antennas and Propagation, 2012
A novel coplanar-waveguide (CPW) bandpass filter using short-circuit slotlines and varactor diodes is introduced. This bandpass filter, when integrated with a CPW wideband antenna, produces frequency agility with a wideband mode and a continuous narrowband mode.
Abubakar Tariq, Hooshang Ghafouri-Shiraz
openaire   +1 more source

Millimeter-Wave Frequency-Reconfigurable Metasurface Antenna Based on Vanadium Dioxide Films

IEEE Transactions on Antennas and Propagation, 2021
A novel frequency-reconfigurable method using vanadium dioxide (VO2) is proposed. VO2 is one kind of phase change material (PCM) which can be electrically switched between the states of insulator and metal.
Wanchen Yang, Chenyu Zhou, Q. Xue, Q. Wen, W. Che   +4 more
semanticscholar   +1 more source