Modeling of a Planar Nine-Way Metamaterial Power Divider/Combiner

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...     

A Dual-Band Wilkinson Power Divider

A new scheme is proposed for the dual-band operation of the Wilkinson power divider/combiner. The dual band operation is achieved by attaching two central transmission line stubs to the conventional Wilkinson divider. It has simple structure and is suitable for distributed circuit implementation.     

A Dual-Band Out-of-Phase Power Divider

This letter proposes a novel out-of-phase power divider that operates at two arbitrary frequencies. Because of the use of the balanced transmission line, namely the double-sided parallel-strip line (DSPSL), the out-of-phase feature between the two output ports can be made frequency-independent. The power divider employs three lumped components (an inductor L, a capacitor C and a resistor R) in serial connection to achieve isolation between the two output ports. The design equations are derived using the odd-mode and even-mode analysis. Experimental results show that good matching, isolation and amplitude balance are simultaneously achievable for both of the two operating frequency bands.     

A Novel Planar Three-Way Power Divider

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.     

Optimized E-Plane T-Junction Series Power Dividers

A rigorous design theory for compact rectangrdar waveguide power dividers with unsymmetrical series E-plane T-junctions of suitably optimized different waveguide heights and distances is described. The method is based on field expansion in normalized eigenmodes which yield directly the modal S-matrix of two appropriate key building blocks. The immediate modal S-matrix combination of the individual structures includes the effects of all step discontinuities and their mutual higher order mode interaction. Computer-optimized -3.01 dB, -4.77 dB, and -6.02 dB power divider examples achieve about +-0.25 dB coupling deviation at the output ports, together with about 30 dB return loss at the input port, for the chosen design frequencies of 12 GHz, 31.6 GHz, and 15.5 GHz. The -4.77 dB power divider provides a bandwidth of about 8 percent. The theory is verified by measurements.     

A Compact UWB Three-Way Power Divider

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.     

A New Microwave Variable Power Divider

A new variable power divider (VPO) has been developed without any phase shifter and only two diodes are needed and in a balanced circuit four diodes. The two varactor diodes are equally biased. The differential phase shift between the output is zero independent of the power dividing ratio. Measurements on an experimental VPD at L-band frequencies are presented.     

Split-Tee Power Divider

A new type of power divider is described which provides two in-phase isolated outputs with a constant arbitrary power division over a wide bandwidth. The derivation of the formulas from which the unit may be deisgned and its performance predicted are given. The bandwidth characteristics of a two-third, one-third power divider are given along with experimental verification.     

多路不等分径向波导功率分配器

根据径向波导传输线理论,提出了一种基于多圈多路功率分配网络匹配级联的多路不等分功率分配器设计方法;并利用径向波导场结构特性和多探针耦合原理,实现了一种多路不等分功率分配器,该结构具有低损耗、高精度性能,且可实现所需的端口相位和幅度一致性.作为验证,文中实现了一个L波段19路不等分功率分配器,电磁仿真和测试结果表明,内圈7路幅相不平衡度分别小于0.1dB和0.4°,外圈12端口幅相不平衡度分别小于0.3dB和1.8°.测试与仿真结果比较吻合,验证了该分析方法的正确性与可行性.     

一种新型小型化功分器

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。     

一种微带功分耦合器的设计

描述了一种微带功分耦合器,它是收发(T/R)组件中的重要组成部分,起着监测和校准的作用.项目设计要求的工作频段在9.3GHz～9.8GHz,端口驻波应小于1.2,两臂间隔离度大于25dB,两个定向耦合器的耦合度C=30dB,定向性D=15dB～20dB.常规微带耦合器的定向性比带状线耦合器的定向性差,有多种方法可以改善...     

A Compact Ka-Band Planar Three-Way Power Divider

A Ka-band planar three-way power divider which uses the coupled line instead of the transmission line is proposed to reduce chip size. The proposed planar topology, different from the conventional Wilkinson power divider, is analyzed and can provide not only compact but also dc block characteristics, which are very suitable for monolithic microwave integrated circuit applications. The divider implemented by a pHEMT process shows an insertion loss less than 5.1 dB and an output isolation better than 17 dB. A return loss less than 18 dB and a phase difference of 4.2deg at 30 GHz can be achieved. Finally, good agreements between the simulation and experimental results are shown.     

A Variable-Ratio Microwave Power Divider and Multiplexer

A microwave circuit is presented which provides continuous variation of microwave power between two outputs in any desired ratio. A typical device utilizing the circuit is described, and other uses of the circuit are discussed. An X-band power divider was constructed which had a vswr of less than 1.2 at all times over the frequency range of 8.6 to 9.6 kmc, divided the total input energy between the outputs in any ratio from 1/10,000 to 1, and had less than 0.4-db total insertion loss. No other losses were present. Adjustment could be made under maximum power levels of the waveguide. Another use of the circuit is to couple two high-power transmitters into one output, thus providing a dual frequency antenna coupler or diplexer. By cascading diplexers, multiplexing can be accomplished.     

具有带通响应的槽线微波功分器

首次提出一种基于半波长槽线谐振器的功分器。该功分器集合了功率分配、带通响应这两种功能于一身,实现了电路设计的多功能化和小型化。该功分器的仿真和测试结果吻合良好,在通带内功分器的两个输出端口3dB等分同时插入损耗小于2dB。区别于传统功分器的是,该功分器两个输出端口的在基波同相,而在二次谐波处为反相信号。这个特点在微波非线性电路的功率合成过程中可用来抑制二次谐波。     

宽带高隔离度功率分配器的设计

在固态毫米波功率放大器设计中,单片MMIC 输出功率较小,提高系统功率的有效方法是采用功率合成技术,目前的功率合成技术存在的设计难点是提高各分配支路间的隔离度。本文基于对传统魔T 的分析和改进,提出了一种高隔离度的3 dB 功率分配结构。经实验测试,运用该结构设计的功率分配器,在29.3-39.3GHz 的频带内两等分支路之间的隔离度可高达-42dB,两支路的不平衡度低于0.1dB,插入损耗优于-0.25dB,很好地满足了实际应用的要求。     

一种新颖的Ku频段宽带波导功分器

介绍了一种新颖的E面波导T型宽带功分器结构,并利用HFSS软件对这种结构进行了优化设计。实物测试结果表明,在12．5～18GHz频率范围内,插损小于0．3dB,输入端口的回波优于-17dB,与仿真有较好的一致性。     

一种新型Ka频段六路功率分配/合成网络

指出了二进制(2n)功率合成方式的不足,介绍了波导—微带探针过渡和3 dB分支波导定向耦合器的原理。提出了改进型分支波导三路功率分配器,该结构具有损耗低、驻波好、幅度相位一致性好和端口隔离度高等优点。针对现有合成方式的不足,提出了一种新型基于波导的Ka频段六路功率分配/合成网络,该结构由改进型分支波导三路功率分配器、3 dB分支波导定向耦合器和E面波导—微带探针过渡组成。     

微带功分器的设计

介绍了宽带微带功分器的设计方法,设计工作频带在6～18GHz的微带功分器,使用Agilent公司的高级设计系统（ADS）软件进行仿真,得到了理想的结果。     

An N-Way Hybrid Power Divider

A circularly symmetric power divider is described which splits a signal into n equiphase equiamplitude parts where n can be odd or even. The power divider provides isolation between output terminals and approximately matched terminal impedances over about a 20 per cent band. A theory of operation is given which yields the necessary design parameters, and an experimental model is described which has a minimum isolation of -27 db between output terminals, an output VSWR of 1.6, and an input VSWR of 1.2.     

一种复合巴伦功分器电路的设计

为实现多模信号合成输出,设计了一种复合巴伦功分器电路.文中分析了双层带状线结构,推导出了其特性阻抗计算公式和复合电路的传输矩阵.仿真和测试结果表明,电路具有较好的双模平衡合成性能,同时次模的两个输出实现了180°相移,并在塔康相控阵天线中得到了成功应用.