共查询到20条相似文献,搜索用时 0 毫秒
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《Microwave and Wireless Components Letters, IEEE》2006,16(8):449-451
A novel planar three-way power divider is proposed. Based on the conventional planar microstrip coupled line technology, the proposed three-way power divider can modify a three-way Wilkinson power divider from a three-dimensional configuration into a two-dimensional one, meanwhile, to keep the length of the circuit to be$lambda/$ 4. The planar structure enables easy circuit design in printed circuit boards and monolithic microwave integrated circuits. The design concept and implementation are discussed. From the measured results, less than 4.8$pm $ 0.1dB of the three equivalent insertion losses, less than 19.5dB of the return loss, and better than 17.5dB of isolation at 2.4GHz can be achieved. 相似文献
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A three-way power divider with ultra wideband behavior is presented. It has a compact size with an overall dimension of 20 mm times 30 mm. The proposed divider utilizes broadside coupling via multilayer microstrip/slot transitions of elliptical shape. The simulated and measured results show that the proposed device has 4.77 plusmn 1 dB insertion loss, better than 17 dB return loss, and better than 15 dB isolation across the frequency band 3.1 to 10.6 GHz. 相似文献
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文章提出了一种新的功分器分析方法。该方法利用任意两个隔离端口之间的反射和隔离散射参数,严格推导了任意两个隔离端口应该满足的以Y矩阵表示的约束条件。同时提出了先功分电路,后隔离电路的设计流程,为器件的小型化设计指引了方向。与传统的奇/偶模方法相比,该方法对于非对称功分器提供了更严谨的分析过程。该方法也适用于分析任意端口数、任意端接实阻抗、任意功分比的功分器、正交和180°耦合器设计问题。利用该方法,在微带PCB(印刷电路板)上,制作了一款功分器。通过对比理论计算、全波仿真以及测量结果,表明设计的小型化功分器性能良好。 相似文献
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Meng-Ju Chiang Hsien-Shun Wu Ching-Kuang Tzuang 《Microwave and Wireless Components Letters, IEEE》2007,17(12):837-839
This work presents a Ka-band two-way 3 dB Wilkinson power divider using synthetic quasi-transverse electromagnetic (TEM) transmission lines (TLs). The synthetic quasi-TEM TL, also called complementary-conducting-strip TL (CCS TL), is theoretically analyzed. The equivalent TL model, whose production is based on the extracted results, is applied to the power divider design. The prototype is fabricated by the standard 0.18 mum 1P6M CMOS technology, showing the circuit size of 210.0 mumtimes390.0 mum without contact pads. The measurement results, which match the 50 Omega system, reveal perfect agreements with those of the simulations. The comparison reveals the following characteristics. The divider exhibits an equal power-split with the insertion losses (S21 and S31) of 3.65 dB. The return losses (S11, S22 and S33) of the prototype are higher than 10.0 dB from 30.0 to 40.0 GHz. 相似文献
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《Microwave Theory and Techniques》2008,56(8):1889-1898
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《Microwave Theory and Techniques》2009,57(11):2761-2767
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提出了一种波导三路功分器结构,该功分器采用E面T型缝隙耦合结构来实现功分比的调节。通过调节耦合缝隙以及感性膜片,使输入阻抗匹配并且实现等功率同相位的三路功分输出。为了实现功率合成,采用对称的两个三路功分器进行背靠背级联实现功率合成网络,仿真结果显示出良好的驻波效果和极低的插损。最终对加工出的实物进行测量,在32.5~36 GHz频段内实现了输出功率幅度不平衡度小于0.5 dB的良好效果。通过背靠背连接两个功分器实现了在33.3~35.3 GHz带宽内插损小于0.3 dB的功率分配/合成网络。 相似文献
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Design of a Compact UWB Out-of-Phase Power Divider 总被引:1,自引:0,他引:1
The design of a compact out-of-phase uniplanar power divider operating over an ultra wide frequency band is presented. To achieve an out-of-phase signal division over a large frequency range, a T-junction formed by a slotline and a microstrip line accompanied by wideband microstrip to slotline transitions is employed. The simulated and experimental results of the developed divider show a low insertion loss and good return loss performance of the three ports across the band 3.1-10.6 GHz 相似文献
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为了简化双频Wilkinson功分器的总体结构,并减小功分器的整体尺寸,在对奇模-偶模理论深入研究的基础上,利用传输线的双频阻抗变换特性,并在输入端口并联开路微带线,设计出了一个尺寸小,工作在900和2 450 MHz两个RFID频段的功分器。对功分器进行ADS仿真与实际测试,测试结果显示:当其在两个中心频率点时,传输损耗分别为3.20和3.23 dB,隔离度小于-28 dB,各个端口的回波损耗小于-30 dB,测试与仿真结果吻合良好。同时,该实测结果也显示出了功分器在两个RFID频率上具有良好的性能指标,验证了设计方案是可行的,也保证了能够很好地应用于双频RFID系统中。 相似文献
11.
Kaijun Song Yuchen Yan Yedi Zhou Maoyu Fan Yong Fan 《Journal of Infrared, Millimeter and Terahertz Waves》2018,39(10):996-1004
A Ka-band Gysel power divider based on rectangular waveguide is presented in this paper. The model and equivalent circuit of the presented power divider is introduced. The even- and odd-mode analytical method is applied to analyze the equivalent circuit. A Ka-band waveguide Gysel power divider is designed, optimized, fabricated, and measured. Good agreement between the simulated and measured results is demonstrated. The measured average insertion loss is approximately 0.25 dB from 30 to 34 GHz. The measured output isolation in the same frequency band is greater than 15 dB. 相似文献
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A Compact Ka-Band PHEMT MMIC Voltage Controlled Oscillator 总被引:1,自引:1,他引:1
A compact Ka-band monolithic microwave integrated circuit(MMIC) voltage controlled oscillator (VCO) with wide tuning range and high output power,which is based on GaAs PHEMT process,is presented.A method is introduced to reduce the chip size and to increase the bandwidth of operation.The procedure to design a MMIC VCO is also described here.The measured oscillating frequency of the MMIC VCO is 36±1.2GHz and the output power is 10±1dBm.The fabricated MMIC chip size is 1.3mm×1.0mm. 相似文献
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Analysis of the scattering parameters (S-parameters) of planarN-way metamaterial power dividers/combiners mostly uses commercial microwave circuit simulators due to the large circuit size involved. Thi... 相似文献
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Yongle Wu Yuanan Liu Shulan Li Hui Zhou 《Journal of Infrared, Millimeter and Terahertz Waves》2010,31(2):228-236
A novel design of compact dual-band equal power divider circuit for large frequency-ratio (greater than 3) applications is proposed in this paper. Topology of the circuit consists of two-section transmission-line transformers and a series RLC network for isolation. This power divider provides an equal power-dividing at two arbitrary frequencies which feature high center frequency-ratio. Besides, this power divider achieves good port matching and isolation. Theoretical derivations are presented and verified by measuring a 3-dB microstrip power divider operating at both 1 GHz and 4 GHz. 相似文献
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Pollak J. Moisan M. Zakrzewski Z. Pelletier J. Arnal Y. A. Lacoste A. Lagarde T. 《Microwave Theory and Techniques》2007,55(5):951-957
The device described in this paper has been designed to enable the feeding of many individual plasma sources from a single microwave generator, providing a noninterfering and constant supply of power to each coaxial line driving these plasma sources. The power coming from the generator flows through a waveguide under standing-wave conditions provided by the presence of a conducting plane located at the waveguide end opposite that linked to the generator. Power is extracted from the waveguide, at the maximum of intensity of the E-field standing wave, by a waveguide-to-coaxial-line transition designated as a probe. One or two probes can be set at each such maximum of field intensity (and this on both sides of the waveguide wide wall), yielding a compact power divider. Each coaxial line feeds a microwave field applicator, sustaining plasma, through a matching circuit comprising a tuning means and a ferrite isolator (circulator with a matched load), the latter ensuring that whatever happens to the plasma source, the other feeding lines are not affected. The conditions required for a perfect match of the microwave generator to the power divider are elaborated and examples of actual designs are presented 相似文献
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《Microwave and Wireless Components Letters, IEEE》2008,18(9):572-574
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分别设计了一分四和一分八的宽带紧凑型基片集成径向波导(SIRW )功分器,通过馈电探针的阶梯化方式,使常规一分四和一分八SIRW功分器在回波损耗小于-15 dB条件下的相对工作带宽由原先的6%和15%分别提高至58%和61%,仿真得到的带内插耗分别在-6.25 dB和-9.25 dB以内。为了验证仿真数据的准确性,对一分四功分器进行了测试,测试结果性能良好,满足工程使用要求。 相似文献
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Roland Reese Henning Tesmer Matthias Jost Ersin Polat Matthias Nickel Rolf Jakoby Holger Maune 《Journal of Infrared, Millimeter and Terahertz Waves》2018,39(12):1185-1202
In this work, multimode interference is investigated for the design of a two-dimensional fully dielectric power divider, well suited for the usage of dielectric waveguides. Most important, power division is achieved in a single device without the need of cascading multiple dividers. This allows to design a very compact and lightweight power divider, well applicable for dielectric rod antenna arrays. As a proof of concept for the used technique, a 16-way power divider with 4 × 4 output ports, made out of Rexolite, is realized, working in a frequency range between 90 and 105 GHz. For the S-parameter measurements, a special measurement setup, including a modular pin probe technique as well as radiation taper for waveguide termination, is proposed. The measurements are in good agreement with the simulations with a power split of ??15 dB for all output ports within the desired frequency range. This is equal to an additional insertion loss of 3 dB. To demonstrate the usability for antenna arrays, a fully dielectric rod antenna array is realized based on the proposed power divider. With this array, a gain of 22.5 dBi at 97.5 GHz was achieved. 相似文献