On Miniaturization and Performance Improvement of Planar Wideband Bandpass Filters Without Coupled Lines

Date

2009-10-01

Author

Alicioglu, Bulent
Yıldırım, Nevzat

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

326
views

0
downloads

Two classical approaches are compared in various respects for the design of wideband planar BPF's without parallel coupled lines, namely, BPF's designed by pole placement with contributing Unit Elements (UE) and inverter coupled resonator filters designed from LP prototypes. It is shown that the circuit obtained by direct BP synthesis is a special case of inverter coupled filter with inverters converted into single Unit Elements. It is also shown that if the inverters are converted into odd number of UE's then they become contributing UE's which can be used to improve skirt slopes considerably. For transversal size reduction and reshaping the stopband response, equivalent circuits of all-stub resonators are derived by starting from distributed element resonator models. The techniques are applied on a Unit Element coupled all-stub resonator BP filters resulting in wide spurious free stopbands with reduced size.

Subject Keywords

Noncommensurate filters, Planar filters, Microstrip filters, Miniaturized filters, Quasi lumped filters

URI

https://hdl.handle.net/11511/55159

Conference Name

37th European Microwave Conference

Collections

Department of Electrical and Electronics Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Design of Microstrip Quadruplet Filters on Filpro Oruc, Sacid; Yıldırım, Nevzat (2018-11-02) In this paper, a simple dimensional design procedure is developed for microstrip/stripline quadruplet filters by starting with direct BP synthesis of a lumped quadruplet with inverter couplings, K14, K12, K23 and K34. K14 is the cross-coupling inverter which creates a symmetric pair of finite transmission zeros (FTZ's) if the sign of K14 is opposite of the other inverters while a complex TZ is created if K14 has the same sign as the other inverters leading to linear phase (flat delay) responses. The LC reso...
Waveguide filters with ridged and unequal width resonators Yıldırım, Nevzat; Hizal, A (2005-06-17) Analytical expressions are developed for characterization of ridged / finned waveguides for use in the design of direct coupled waveguide filters with ridged and / or unequal width resonators. The analytical expressions are used to control the harmonic passbands and higher order modes. A survey is made for comparison of responses of waveguide filters using unequal width resonators and unequal ridge resonators. it is found that ridged resonators are more effective in suppressing the spurious passbands in the...
Investigation on Series Active Filter Compensated High Power Grid-Connected Voltage Source Inverters with LCL Filter Usluer, S. Nadir; Hava, Ahmet Masum (2014-09-18) This paper deals with Series Active Filter (SAF) based damping methods for the LCL filters of three-phase, grid connected, low voltage, high power Voltage Source Inverters (VSIs). The inherent resonance problem of LCL filters is damped via passive or active damping methods. Passive damping methods employing damping resistors create significant power losses reducing the overall system's efficiency for high power inverters. Active damping methods, on the other hand, are not applicable due to inverter's limite...
Dimensional Design of Dual Mode Waveguide Multiplexers Boyacioglu, Gokhan; Alicioglu, Bulent; Yıldırım, Nevzat (2018-11-02) In this paper, a systematic design procedure is described for manifold type multiplexers formed by the classical circular dual mode waveguide filters. The design procedure starts with cascade synthesis of lumped quadruplet version of the filters with inverter couplings. Then the LC resonators are converted into SC transmission line (SCTL) resonators. The whole circuit is then impedance scaled by inverters at ports for realization of resonators as waveguides with desired cross-sectional dimensions thus formi...
Design of Selective Linear Phase Cross-Coupled Dielectric Resonator Filters Ozturk, Onur Ozan; Oruc, Sacid; Alicioglu, Bulent; Yıldırım, Nevzat (2018-11-02) In this paper, a highly selective linear phase filter is designed and implemented in cross-coupled form using dielectric resonators in Ku band to be used as a channel filter in IMUX of a satellite receiver. Extreme delay flatness is required: 1.5 nS delay ripple over 60 % of the passband and 12 nS near the band edges. The initial design is carried out as 10 resonator symmetric cross-coupled filter with all ideal inverter couplings realizing two finite transmission zeros (FTZ) satisfying also the delay flatn...

Citation Formats

B. Alicioglu and N. Yıldırım, “On Miniaturization and Performance Improvement of Planar Wideband Bandpass Filters Without Coupled Lines,” presented at the 37th European Microwave Conference, Rome, ITALY, 2009, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/55159.