Results 81 to 90 of about 7,267 (227)

Reflectionless Linearly/Circularly Polarised Patch Antenna Based on Loading Complementary Absorptive Branches

Electronics Letters, Volume 61, Issue 1, January/December 2025.
This letter proposes reflectionless linearly and circularly polarised patch antennas based on loading complementary absorptive branches. By establishing the equivalent circuit model of a conventional patch antenna, the complementary absorptive branch could be designed to dissipate the out‐of‐band energy through the grounded resistor, thereby achieving ...
Qiaoyu Chen, Sikuo Tian, Xiulong Chi, Gang Zhang, Shiyan Wang   +4 more
wiley   +1 more source

Tunable Microwave Bandpass Filters With Complementary Split Ring Resonator and Liquid Crystal Materials

IEEE Access, 2019
In this paper, a novel planar waveguide filter based on liquid crystal materials is devised, and a half-mode corrugated substrate integrated waveguide (HMCSIW) tunable bandpass filter with complementary split ring resonator (CSRR) structure is proposed ...
Di Jiang, Yupeng Liu, Xiaoyu Li, Guofu Wang, Zhi Zheng   +4 more
doaj   +1 more source

Multiband waveguide filters with advanced filtering characteristics based on an in‐band transmission zeros method and stacked cylindrical resonators

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
This paper presents a novel multiband waveguide filter implementation capable of advanced filtering characteristics while maintaining a compact footprint. Filter design with practical considerations is detailed, and several filter prototypes with various topologies are analysed. Experimental results are obtained to validate the work.
Povilas Vaitukaitis, Jiayu Rao, Kenneth Nai, Jiasheng Hong   +3 more
wiley   +1 more source

A Novel High Suppression Multilayer Frequency‐Selective Surface Based on Hexagonal Grids

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
This FSS exhibits passband characteristics at around 8.15 GHz with the resonance frequency and passband characteristics remaining stable under 50° oblique incidence and TE and TM polarisation. Furthermore, its rapid roll‐off and wideband suppression characteristics are not sensitive to incidence angle and polarisation variations indicating excellent ...
Boyang Wang, Xuewu Cui, Wei Yang, Lei Han, Suli Guo   +4 more
wiley   +1 more source

A Miniaturize Bandpass Filter with Harmonic Suppression Using Meandered Quarter-Wavelength Resonators

International Journal of Antennas and Propagation, 2014
A miniaturized bandpass filter with harmonics suppression is presented. The proposed filter consists of two quarter-wavelength microstrip resonators, which are meandered for circuit size reduction. An interdigital capacitor, loading at zero-voltage point,
Yun-Long Lu, Shun Wang, Tingting Gu, Ping Cao, Kai Li   +4 more
doaj   +1 more source

Enhanced Gain Through a Novel Approach to Designing a Composite SWB Antenna‐FSS

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
ABSTRACT In this paper, we propose a novel dual‐layered frequency selective surface (FSS) with a unit cell dimension (length × ${\times} $ width × ${\times} $ thickness) of 30λ×30λ×1.8λ $30\lambda \times 30\lambda \times 1.8\lambda $, operating over a frequency range of 0.5–14.1 GHz (187%) (λ $\lambda $ represents the wavelength at 8.3 GHz).
Hamed Joudaki, Amir Saman Nooramin
wiley   +1 more source

Study the Comparison between Un-Bended and Bended Broadband Parallel Coupled Microstrip Bandpass Filters Under Certain Angle

Journal of Engineering and Sustainable Development, 2011
In this paper, design and simulation of broadband parallel-coupled microstrip bandpass filters used for modern wireless communication technology (Military & Industrial System such as Low Noise Block ( ) in Television Satellite) are presented, Four ...
Ahmed H. Reja, Abdul Kareem K. Abdul Raheem, Raidh Adnan Kedhim   +2 more
doaj  

The bolometric focal plane array of the Polarbear CMB experiment

, 2012
The Polarbear Cosmic Microwave Background (CMB) polarization experiment is currently observing from the Atacama Desert in Northern Chile. It will characterize the expected B-mode polarization due to gravitational lensing of the CMB, and search for the ...
Ade, P. A. R., Anthony, A. E., Arnold, K., Barron, D., Boettger, D., Borrill, J., Chapman, S., Chinone, Y., Dobbs, M. A., Errard, J., Fabbian, G., Flanigan, D., Fuller, G., Ghribi, A., Grainger, W., Halverson, N., Hasegawa, M., Hattori, K., Hazumi, M., Holzapfel, W. L., Howard, J., Hyland, P., Jaffe, A., Jeune, M. Le, Keating, B., Kermish, Z., Kisner, T., Lee, A. T., Linder, E., Lungu, M., Matsuda, F., Matsumura, T., Meng, X., Miller, N. J., Morii, H., Moyerman, S., Myers, M. J., Nishino, H., Paar, H., Quealy, E., Reichardt, C., Richards, P. L., Ross, C., Shimizu, A., Shimmin, C., Shimon, M., Sholl, M., Siritanasak, P., Spieler, H., Stebor, N., Steinbach, B., Stompor, R., Suzuki, A., Tomaru, T., Tucker, C., Zahn, O.   +55 more
core   +3 more sources

Reflectionless Bandpass Filters Using Two Dual Bandpass Filters

IET Microwaves, Antennas &Propagation, Volume 19, Issue 1, January/December 2025.
A new approach for designing a reflectionless bandpass filter is presented at microwave frequency. Two dual band‐pass (BP) filters and a Wilkinson‐like power divider are used to match the input and output ports. Based on the dual circuits theory, it is possible to absorb the reflections of the two dual BPFs in one resistor and prevent the total ...
Mohammad‐Mahdi Taskhiri, Mohammad Khalaj‐Amirhosseini   +1 more
wiley   +1 more source

Tuning the Resonance Frequency and Miniaturization of a Novel Microstrip Bandpass Filter

The Journal of Engineering Research, 2018
In this paper, a compact microstrip bandpass filter is designed using two open loop resonators. In order to obtain a tunable bandpass response with low insertion loss, two stubs are loaded inside them.
Abbas Rezaei, Leila Noori
doaj   +1 more source