- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
DESIGN OF DUAL- AND QUAD-BAND E-CRLH-TLS WITH ARBITRARY PHASE CHARACTERISTICS
摘要： In this paper, extended composite right/left-handed (E-CRLH) transmission line (TL) metamaterial structures, with two left-handed (backward) and two right-handed (forward) pass bands, are investigated. Also, design procedures in order to design dual- and quad-band E-CRLH-TLs are presented in detail and the parameters of these structures are extracted by clean formulas, while satisfying arbitrary phase shifts at the operating frequencies. Finally, the dispersion and characteristic impedances of these transmission lines are derived and plotted. The results of this paper can be applied to any type of TL-based dual- and quad-band microwave component.
关键词： microwave component,metamaterial,phase shift,dual-band,E-CRLH,quad-band,transmission line
更新于2025-09-23 15:22:29
-
Design and analysis of a quad-band substrate-integrated-waveguide cavity backed slot antenna for 5G applications
摘要： A planar and compact substrate integrated waveguide (SIW) cavity backed antenna and a 2 × 2 multi-input multi-output (MIMO) antenna are presented in this study. The proposed antenna is fed by a grounded coplanar waveguide (GCPW) to SIW type transition and planned to be used for millimeter-wave (mm-wave) fifth generation (5G) wireless communications that operates at 28, 38, 45, and 60 GHz frequency bands. Moreover, the measured impedance bandwidth (|S11| ≤ ? 10 dB) of the antenna covers 27.55 to 29.36, 37.41 to 38.5, 44.14 to 46.19, and 57.57 to 62.32 GHz bands and confirms the quad-band characteristic. Omni-directional radiation characteristics are observed in the far-field radiation pattern measurements of the antenna over the entire operating frequency. The reported antenna is compact in size (9.7 × 13.3 × 0.6 mm3) and the gain values at each resonance frequency are measured as 3.26, 3.28, 3.34, and 4.51 dBi, respectively. Furthermore, the MIMO antenna performance is evaluated in terms of isolation, envelope correlation coefficient and diversity gain.
关键词： fifth generation,grounded coplanar waveguide,quad-band,substrate integrated waveguide,cavity backed antenna
更新于2025-09-23 15:21:01
-
Tunable quad-band transmission response, based on single-layer metamaterials
摘要： We investigated the electromagnetically induced transparency (EIT)-like effects in planar metamaterials (MMs) at microwave (GHz) frequencies. The specific MMs that were used in this study consist of cut-wire resonator/ring resonator, which achieved the dual EIT-like effects in a single-layer through the bright- and quasi-dark-mode coupling and the lattice mode coupling. In addition, by varying the distance between the two resonators, the quad-band EIT spectral response in the microwave region was obtained, and the group refractive index at the EIT-like resonance of proposed design reached up to 4,000. This study provides the design approach to the multispectral EIT-like effects and might suggest potential applications in a variety of fields, for example, low-loss slow-light device, multiple switching sensor, and other sensing devices.
关键词： microwave frequencies,slow-light device,quad-band transmission,electromagnetically induced transparency,metamaterials
更新于2025-09-23 15:21:01
-
Compact quad-band band-pass filters using stepped-impedance coupled-line resonators
摘要： In this article, compact quad-band band-pass filters are realized by using stepped-impedance coupled-line quad-mode resonators (SICLQMRs). The compactness of the quad-mode resonator relies in its folded structure without extra space between the parallel lines. Unlike stepped-impedance resonators, SICLQMRs provide more design freedoms for controlling the four resonating frequencies since the even- and odd-mode equivalents can be separately assigned with characteristic impedances. Internal and external couplings are also parallel couplings, resulting in very compact dimensions of the filters. Simulated and measured S parameters are compared with good agreement, demonstrating the feasibility of the design.
关键词： quad-band band-pass filter,stepped-impedance coupled-line quad-mode resonators
更新于2025-09-23 15:19:57
-
Equal and unequal quad-band Gysel power dividers
摘要： This article presents for the first time a quad-band Gysel power divider capable of achieving equal and unequal power division at four arbitrary frequencies. The structure of the proposed divider is similar to its single-band counterpart but loaded with quad-band reactive networks. The design procedure and theoretical analysis of the proposed divider are presented. A quad-band Gysel power divider with equal division and another with 2:1 unequal division are designed at the operational frequencies of 0.85, 1.6, 2.4, and 3 GHz. Simulation and measurement results of the two dividers are presented, and good performance is observed at each band. For both designs, the realized power division ratios are within 1 dB from their ideal values, whereas the matching and isolation levels are below ?10 dB at the four bands.
关键词： quad-band,impedance transformer,power divider,multi-band
更新于2025-09-23 15:19:57
-
A quad‐band Sierpenski based fractal antenna fed by co‐planar waveguide
摘要： In this article, A Sierpenski based octagonal carpet fractal antenna is introduced for quad-band applications. The proposed antenna developed with FR-4 substrate material with relative permittivity of 4.4, thickness chosen is 1.6 mm and co-planar waveguide feed is used in this design. The antenna is designed, simulated with computer simulation technology studio suite, printed and tested. The measurement results of proposed antenna resonates at 2.4, 4.45, 9.1, 10.24, 12.46 GHz and are well suited for C-band(2.4 GHz), L-band (4.45 GHz), X-band (9.1 GHz, 10.24 GHz), Ku-band (12.46 GHz) applications. Good agreement between the results of simulation and measurement is observed with applications.
关键词： Sierpenski fractal antenna,multiband applications,quad-band,co-planar waveguide
更新于2025-09-11 14:15:04
-
A COMPACT QUAD-BAND BANDPASS FILTER USING MULTI-MODE STUB-LOADED RESONATOR
摘要： This paper presents a compact shorted stub-loaded quad-band bandpass ?lter. The proposed ?lter simultaneously operates at GSM (0.83–0.97 GHz), LTE2300 (2300–2400 MHz), WiMAX (3.3–3.7 GHz), and WLAN (5.725–5.825 GHz) bands. The ?lter has been designed using the technique of stub-loaded resonator (SLR). By changing the length of the center-loaded stub, the resonant frequency of the even-mode can be varied without a?ecting that of the odd-mode. This simpli?es the design and tuning of the quad-band ?lter. Eight transmission zeros (TZs) around the three passband make the pass bands highly isolated. In order to validate its practicability, a quad-band bandpass ?lter (BPF) has been designed, fabricated and measured. Good agreement between simulated and measured results is observed.
关键词： LTE,GSM,WLAN,stub-loaded resonator,WiMAX,quad-band bandpass filter
更新于2025-09-09 09:28:46