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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - An Ultra Wide-Stopband Lowpass Filter Using Smooth Transmission Line
摘要： A novel 6GHz ultra Wide Stopband lowpass filter using smooth transmission line is presented in this paper. The filter has the advantages of easy fabrication, sharp cutoff frequency response and wide stopband. Its spurious response is at about 35GHz, while the stopband of the most general filters typically extend to 3 times of the band edge frequency. Then the procedure of designing such non-uniform microstrip lowpass filters is introduced, and the measured results show good agreement with simulation results.
关键词： non-uniform microstrip line,wide stopband,Lowpass
更新于2025-09-23 15:22:29
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[IEEE 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Chengdu, China (2018.5.7-2018.5.11)] 2018 International Conference on Microwave and Millimeter Wave Technology (ICMMT) - Mutual Coupling Reduction Using I-Shaped Microstrip Line and X-Shaped Slot
摘要： A novel decoupling structure composed of an I-shaped microstrip line and an X-shaped slot etched from the ground plane is proposed and applied to decouple the conventional antenna array at 5.25GHz, whose typical edge-to-edge distance is 10mm (0.175λ0). Results indicate that the structure has superior decoupling capability, achieving a maximum 34.2dB reduction of mutual coupling. With wider impedance bandwidth, high isolation and improved gain, the structure is potential in the application of multi-element array and communication system.
关键词： slot,microstrip line,mutual coupling,antenna array
更新于2025-09-23 15:22:29
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Microstrip Line Impedance Matching Using ENZ Metamaterials, Design and Application
摘要： The idea of this paper is to extend the tunneling effect of epsilon-near-zero (ENZ) narrow channel for matching two microstrip lines with different impedance characteristics. The main advantage of this method is the possibility to design a channel with subwavelength electrical size and obtain similar matching condition when compared with a conventional λ/4-transformer. The bandwidth of the structure is directly related to the bandwidth of the ENZ-metamaterials (MTM). The suggested matching circuit is comprised of a metallic wall and an ENZ narrow channel. To realize the ENZ channel, a rectangular waveguide which operates in TE10 mode is designed and implemented using a substrate integrated waveguide (SIW) technology. A set of vias are also needed for emulating the metallic wall to reduce the ENZ channel cross section. The proposed structure for different impedance values of 50?, 100?, and 150? was designed, simulated, fabricated, and tested. Moreover, as an important application of a matching network, a microstrip patch antenna has been matched over the desired frequency band. Simulation results based on CST microwave studio have good agreement with measurements. It is shown that the bandwidth of the circuit is 8%–15%.
关键词： impedance matching,metamaterials (MTM),Epsilon-near-zero (ENZ),microstrip line,tunneling
更新于2025-09-23 15:22:29
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Design and Analysis of Complimentary Split Ring Resonator Backed Microstrip Transmission Line Using Equivalent Circuit Model
摘要： This article presents a compact, low-profile Band-Stop Filter (BSF) designed using Complimentary Split Ring Resonator (CSRR). An equivalent circuit model is also presented along with the simplified mathematical approach to extract the parameters of the circuit model. This paper also presents the effect of variation in the dimensions of split rings on characteristics of BSF. The proposed BSF has a compact size of 27 × 20 mm2 designed an FR-4 substrate with dielectric constant (εr) 4.3. The filter provides complete suppression of the band at 2.4 GHz. The design and circuit analysis of this metamaterial based filter is presented in terms of reflection coefficient, transmission coefficient and impedance curve.
关键词： Bandstop filter (BSF),resonator,metamaterial,microstrip line,complementary split ring resonator (CSRR)
更新于2025-09-23 15:22:29
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Robust design of a broadband dual-polarized transition from PCB to circular dielectric waveguide for mm-wave applications
摘要： A growing interest in dielectric waveguides (DWGs) as an alternative to commonly used waveguides (like coaxial or twisted-pair cables) for high data rate interconnects could be observed in the last few years. Especially in the mm-wave frequency range (30–300 GHz) applications with these waveguides benefit from low losses and low dispersion. Moreover, using both polarizations of the fundamental mode in such waveguides could theoretically double the data rate without the need of higher bandwidth or additional fibers. The connection between DWGs and commonly available transceiver chips requires broadband transitions from planar waveguides like microstrip lines to DWGs. In this paper, an overview of the current developments of such transitions is given and a novel low-complexity design is presented that reduces the space consumption by 35% related to recently published works. This allows an easy integration into a printed circuit board layout or a chip package. Furthermore, an extensive sensitivity analysis is presented to prove the robustness toward manufacturing tolerances. The transition is realized at W-band frequencies (75–110 GHz) and achieves a relative 10 dB-bandwidth of more than 25% with a minimum insertion loss of 1.2 dB. It is shown that these properties even hold for manufacturing tolerances of nowadays manufacturing processes.
关键词： polymer microwave fiber,Dielectric waveguides,chip-to-chip interconnect,microstrip line,multi-gigabit,mm-wave
更新于2025-09-23 15:21:01
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[IEEE 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA) - Granada, Spain (2019.9.9-2019.9.13)] 2019 International Conference on Electromagnetics in Advanced Applications (ICEAA) - Harnessing the Frozen-mode in Coupled Silicon Ridge Waveguides for True Time Delay Applications
摘要： This paper examines a triple band cylindrical dielectric resonator antenna (CDRA) with three different radiating modes, i.e., HEM11δ, TM01δ, and HEM12δ. Excitation of all these radiating modes simultaneously, in CDRA, is the most challenging task, which have been accomplished by using composite feeding structure [combination of vertical strip and psi-shaped (ψ) microstrip line]. Out of three radiating mode, two hybrid modes (i.e., HEM11δ and HEM12δ) radiate in broadside direction, while remaining one (TM01δ) creates monopole like radiation pattern. Diversi?ed radiation patterns make the proposed CDRA suitable for different wireless applications. Simulated outcomes of the proposed antenna design have been practically con?rmed with the help of archetype of proposed antenna. The proposed CDRA is working in three different frequency bands: 2.5–3.02, 3.76–3.86, and 4.38–4.72 GHz. The proposed radiator is quite suitable for WiMAX (2.5 GHz) and vehicular applications.
关键词： microstrip line fed antenna,radiating mode,Cylindrical dielectric resonator antenna,triple band antenna
更新于2025-09-19 17:13:59
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A Tunable Attenuator Based on a Graphene-Loaded Coupled Microstrip Line
摘要： In this article, a novel tunable attenuator based on graphene is proposed. It consists of a coupled microstrip line (CMSL) and two graphene-covered gaps in MSLs. By utilizing a biased voltage, the surface impedance of graphene can be tuned, and then, the re?ective coef?cient at two ports of the coupler can be correspondingly adjusted; therefore, the performance of the attenuator can be modi?ed. The design procedure and the mechanism of the attenuator are demonstrated in detail. To verify the analysis, a prototype was fabricated and tested. According to the measured results, the fabricated attenuator presents the favorable attenuation tuning range from 3 to 20 dB at the operating frequency from 1 to 6 GHz, and it is just 38 mm × 22 mm in size. Besides, |S11| of the attenuator can always be maintained at a low level, and the phase of S21 is substantially unchanged.
关键词： gap in MSL,dynamically tunable,coupled microstrip line (CMSL),Attenuator,graphene
更新于2025-09-16 10:30:52
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Comparative analysis of microstrip-line-fed gap-coupled and direct-coupled microstrip patch antennas for wideband applications
摘要： An attempt is made to improve the impedance bandwidth (S11) of a microstrip antenna by means of the gap-coupling method, yielding a bandwidth of 97.88% for the gap-coupled rectangular microstrip antenna (GC-RMSA) compared with 7.67% for the direct-coupled rectangular microstrip antenna with all dimensions the same. The maximum gain of the proposed (GC-RMSA) design is 6.725 dB with antenna efficiency of 99.86%. The proposed antenna design is analyzed using the IE3D simulator. The microstrip line feed technique is used to energize the antenna, and its performance as a function of the gap between the elements (g) and the width of the feed strip (W) is investigated. The results show that the impedance bandwidth of the gap-coupled antenna depends on the coupling gap between the elements; indeed, as the gap (g) is increased up to a certain level, the bandwidth of the proposed antenna increases, resulting in a wideband characteristic. However, after a certain value of the gap (g), the bandwidth decreases due to spurious radiation, and the antenna characteristic changes from wide to dual band with a corresponding decrease in the bandwidth. The proposed antenna design covers the frequency range from 2.093 to 6.105 GHz, including the C-band, S-band uplink and downlink frequencies, Wi-Fi, Bluetooth, WLAN, and IEEE (a/b/g) standard applications.
关键词： Gap coupled,Bandwidth,Microstrip line feed,IE3D,WLAN,Direct coupled
更新于2025-09-12 10:27:22
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Novel analysis of the size and orientation dependent resonance phenomenon of the microstrip line coupled complementary split‐ring resonator
摘要： The purpose of this article is to provide a comprehensive investigation on the resonance phenomenon of microstrip line coupled complementary split-ring resonator (CSRR) with different orientation and relative size. It is shown that when the relative size of the CSRR is smaller than the host line, the CSRR with its slit oriented orthogonal to the line axis will not excite effectively and show weak resonance behavior. However, when the slit is positioned along the line axis, the cross-polarization effect comes into play, which excites the CSRR through the mixed coupling. To ensure the correctness, several numerical simulations are carried out for different substrate height and relative permittivity. Finally, a prototype is fabricated and measured for the experimental validation.
关键词： complementary split-ring resonator,split-ring resonator,microstrip line
更新于2025-09-12 10:27:22
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POWER DIVIDER BASED ON STEPPED-IMPEDANCE SLOTLINE
摘要： A novel 180? out-of-phase power divider based on stepped-impedance slotline is presented in this article. This power divider employs one T-junction formed by microstrip line and slotline to obtain two out-of-phase dividing signals. Stepped-impedance slotline and lumped resistor are introduced to improve the isolation between output ports. The experimental data show that the proposed power divider has good performance on insertion loss, return losses, isolation, phase balance, as well as group delay over the wide band 5 GHz–10 GHz.
关键词： slotline,isolation,group delay,microstrip line,insertion loss,power divider,phase balance,stepped-impedance slotline,return losses
更新于2025-09-09 09:28:46