Design and Realization of the High-Q Triple Dielectric Resonator Filters with Wide Tuning Range (original) (raw)

Miniature Triple-Mode Dielectric Resonator Filters

IEEE Transactions on Microwave Theory and Techniques

This paper presents a new class of triple mode dielectric resonator filters. These devices use dielectric-loaded cavities with unloaded Q-factor of 3000-5000 and reasonable spurious free window. The proposed structure is less than one quarter of the physical volume of TEM filters of the same Q. A finite element method solver for electromagnetic structures (HFSS) is used to study the main properties of this resonator. Fundamental design rules for a bandpass filter have been presented. A three pole bandpass filter was designed, fabricated and measured to verify the proposed approach.

Designing of low loss Dielectric Resonator Filter

Emerging wireless, space and satellite communication links require light weight, low loss, temperature stable and inexpensivecommunication devices. Microwave filters are the key element of any communication system or microwave link. Microwave filters are usually implementedby using waveguide, coaxial, microstrip or lumped element resonators. Only dielectric resonator filters provide best combination of volume versus insertionloss of filter. Dielectric resonator filters offer very high Q factors to provide lowest pass band insertion loss and higher selectivity with compactness andminimal power requirements [1]. And satisfy vital demand of emerging space communication systems and cellular industry by offering very high-qualityfactor due to their inherent low loss material [2]. This paper describes basic steps to design dielectric resonator filter with the help of a 3D finite-elementmethod (FEM) simulation tool, Ansoft HFSS (High Frequency Structure Simulator). Dielectric disks are use...

High Q-Factor Narrow-Band Bandpass Filter Using Cylindrical Dielectric Resonators for X-Band Applications

Progress In Electromagnetics Research Letters

This paper presents a narrow-band bandpass filter (NBBPF) using three cylindrical dielectric resonators (CDRs) placed on three rectangular metallic cavities (RMCs). Two U-shaped planar resonators located between RMCs are used to realize narrow-band response effectively. The 3 dB fractional bandwidth (FBW) of the proposed filter is 0.275%. The filter is designed for Xband (9.85 GHz), with 20 MHz bandwidth for radar, satellite, and medical accelerators applications. High Q-factor (Q-factor = 400) and low fabrication cost are other advantages of the proposed design. The proposed NBBPF was fabricated, and its performance was measured to verify the design. Good agreement between the measured and simulated data is obtained.

Design of Intermediate-Bandwidth Dielectric Resonator Filters

22nd European Microwave Conference, 1992, 1992

The method of the design of the intermediate-bandwidth dielectric resonator bandpass filters is presented. The results of the analysis of the coupling and mechanical tuning structures are discussed. The realizations of the trial X-band filters with 6% bandwidth are described.

Miniaturized Triple-Mode Bandpass Filter using Dielectric Resonators

2021 IEEE MTT-S International Microwave Filter Workshop (IMFW), 2021

This paper presents a compact triple-mode dielectric resonator bandpass filter based on a single waveguide cavity. Two barium titanate pucks are used in the design, placed in the middle of the metallic cavity to reduce the size of the filter. A third-order simplified Chebyshev bandpass filter is selected to verify the technique and simulated using HFSS software. The input and output coaxial probes are used to excite the degenerate EH11 modes, while the TM01 mode is excited using a vertical hole etched in the top of the barium titanate pucks. The resonator offers a size reduction ratio of about 15.6% compared with equivalent air-filled coaxial filters. The filter has finite transmission zeros on the high or low side of the passband.

Ferrite Tuned Dual-Mode Dielectric Resonator Filters

2006 2nd International Conference on Information & Communication Technologies, 2006

This paper is devoted to the design and construction of a novel technique for ferrite tuning of dielectric loaded, dual-mode cavity filters. This is dealt with in two specific areas: i) Improving the technique to realize a high -Q , low loss, dielectric-loaded, dual-mode cavity band-pass filter, using the hybrid 11 HEM δ mode, ii) Developing techniques to obtain a wide range tuning mechanism, using ferrite materials. The designed dual-mode filters offer unloaded u Q of more than 10,000 with an insertion loss less than 1 dB. It is shown that ferrite tuning is possible either at below resonance or at the above resonance state, depending upon the strength of the applied DC magnetic field. Experimental results showed that due to its lower saturation magnetization YIG offers a wider tuning range compared with Nickel ferrite.

Tunable dielectric resonator bandpass filter

13th International Conference on Microwaves, Radar and Wireless Communications. MIKON - 2000. Conference Proceedings (IEEE Cat. No.00EX428)

A simple but efective technique has been applied to magnetically tune the quasi-TEoll mode dielectric resonators. The tuning was achieved by means of the fkrrite rod situated centrally in the dielectric resonator and extending over the shield The fkrrite parameters were changed by DC magnetic field. The method assures the high quality factor of the resonator, over 3.4% tuning range and suflcientb good spurious response. The tuning has been achieved by means of the ferrite rod situated centrally in the dielectric resonator and extending over the shield to the electromagnet system. The ferrite parameters were changed by DC magnetic field produced by the DC current. The method assures the high quality factor of the resonator, 3.4% tuning range and quite good spurious resppnse. Measured filter characteristics show low insertion loss 0.32 + 0.65 dB and excellent retum loss better than 30 dB at center frequency in the full tuning range.

X-Band dielectric resonator bandpass filter

2010 International Conference on Computer Applications and Industrial Electronics, 2010

This paper presents a new approach of designing a bandpass filter by applying a combination of microstrip and cylindrical shape of dielectric resonators for X-Band application. Three dielectric resonators with a same permittivity and diameter of 60 and 5 mm respectively are applied in the circuit in order to obtain a wideband of more than 1.0 GHz. The interaction between the microstrip transmission line and dielectric resonators increases the coupling effect as well as minimizing the insertion loss in the filter passband. An analysis on the effect of the height of the dielectric resonators has been investigated in order to prove that the new approach contributes more advantages and viable at the desired application band.

Ku-Band High Power Dielectric Resonator Filters

IEEE Transactions on Microwave Theory and Techniques, 2013

In this paper, a novel dielectric-resonator filter configuration is presented. The new filter offers superior Q and wider spurious-mode free range at Ku-Band. Moreover, it offers 70% mass savings over the dual mode designs and over 50% footprint reduction compared with the dual-mode implementations. These characteristics make this technology well suited for the output multiplexer used in Ku-Band satellite applications. A five pole filter has been implemented to prove the superior performance of this new technology. Test data over temperature and high power test results are also presented, including a 3-Channel output multiplexer.