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首页> 外文期刊>International journal of RF and microwave computer-aided engineering >Optimum design of 6-18 GHz ultra-wideband microstrip filters with arbitrary source and load impedances by the least mean squares Method
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Optimum design of 6-18 GHz ultra-wideband microstrip filters with arbitrary source and load impedances by the least mean squares Method

机译：利用最小均方方法优化设计具有任意源阻抗和负载阻抗的6-18 GHz超宽带微带滤波器

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In this article, the method of least mean squares (LMS) is employed to designultra-wideband (UWB) filters with various input and output port impedancesin 6-18 GHz frequency range. Optimization process on the circuit dimensionsis done by MATLAB and AWR microwave office softwares utilizing exactclosed-form relations for microstrip transmission lines and microstrip Tjunctiondiscontinuities. The advantages of this method are its simplicity, fastdesign time, including impedance matching. Two design examples aredepicted in the article. To validate the designed structures, the circuit modelresults are compared with full-wave analysis and measurements. The firstdesign example corresponds to equal source and load impedances. For thisdesign, maximum measured transmission coefficient in the frequency range5.9-16.6 GHz is obtained as −12 dB, upper out-of-band rejection around imagefrequency is better than −17 dB and lower out-of-band rejection at 5 GHz isobtained better than −30 dB. The second design example describes the case ofunequal source and load impedances.
机译：在本文中，最小均方（LMS）方法用于设计6-18 GHz频率范围内具有各种输入和输出端口阻抗的超宽带（UWB）滤波器。电路尺寸的优化过程是由MATLAB和AWR微波办公软件利用微带传输线和微带Tjunction间断点的精确闭合形式关系完成的。这种方法的优点是简单，设计时间短（包括阻抗匹配）。本文中描述了两个设计示例。为了验证设计的结构，将电路模型结果与全波分析和测量进行比较。第一个设计示例对应于相等的源阻抗和负载阻抗。对于此设计，在5.9-16.6 GHz频率范围内获得的最大测得的传输系数为-12 dB，镜像频率附近的较高带外抑制优于-17 dB，并且在5 GHz处具有较低的带外抑制优于−30 dB。第二个设计示例描述了源阻抗和负载阻抗不相等的情况。

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