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Download PDF by Vesna Crnojević-Bengin: Advances in Multi-Band Microstrip Filters

By Vesna Crnojević-Bengin

ISBN-10: 1107081971

ISBN-13: 9781107081970

The 1st of its style, this paintings bargains a close perception right into a diversity of layout approaches for dual-band and tri-band microstrip filters, from concept to functional layout. Originating from the FP7 MultiWaveS undertaking, this accomplished source contains the latest effects from numerous well-established study teams, in addition to specific insurance of competing techniques, starting from the traditional method of complicated multilayer fabrication applied sciences, and the advance and alertness of numerous novel geometries and ideas. In-depth assurance of easy theoretical foundations, special layout tactics and ideas, and comparisons of measured and simulated effects help you choose the optimum method on your reasons and designs, making this a useful source for either scholars and execs within the box of microwave engineering.

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Extra resources for Advances in Multi-Band Microstrip Filters

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Even though this type of filter seemingly allows arbitrary positioning of passbands, this is not the case. e. due to periodicity of the transmission zeros in the response, the positions of the passbands cannot be distant. Another disadvantage is the fact that bandwidths cannot be independently controlled since one zero is “shared” between two passbands and thus two bandwidths cannot be simultaneously controlled. Other filters based on this method, rely on the idea presented in [20]. The idea employs a wideband filter realized with λ/4 short-circuited stubs and introduction of transmission zeros using shunt stubs.

Twice as long dimensions. The price that is paid for this size reduction is a more complex fabrication that requires the use of vias. By the same token, grounded stubs in SLRs enable significant size reduction in comparison to SLRs with nongrounded stubs. Dual-band filters with SLR structures with grounded stubs were proposed in [73–78]. In [74], a dual-band bandpass filter using both an open-stub loaded resonator and a short stub-loaded resonator was presented. Apart from size reduction, use of a short stubloaded resonator enables a transmission zero.

12) where Z1 and Z2 are the characteristic impedances, θ1 and θ2 their electrical lengths, and K the ratio Z2/Z1. 20 Configuration of stepped-impedance resonator. 21 Equivalent circuit for: (a) Even mode. (b) Odd mode. 22 Dependence of θT of θ1 for different values of K. When K = 1, the structure has a uniform impedance and fundamental resonance occurs for θT = π, which is in accordance with the conventional λ/2 resonator. 22 shows how θT changes with θ1 for different values of K, and it can be seen that θT has minimal values for 01.

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Advances in Multi-Band Microstrip Filters by Vesna Crnojević-Bengin

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