Miniaturized Dual-Band Dual-Mode TM-Mode Dielectric Filter in Planar Configuration

Widaa, Abdulrahman; Höft, Michael

doi:10.1109/jmw.2022.3145906

Cited by 10 publications

(10 citation statements)

References 21 publications

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“…Digital Object Identifier XXX/TMTT.XXXX Also, besides the single-mode TM 010 mode, the orthogonal modes TM 120 and TM 210 were utilized to design very compact dual-mode and dual-band filters [12]- [15]. For instance, we recently introduced a miniaturized in-line TM-mode dual-band filter in a planar configuration suitable for mass production [14]. Similarly, diplexers can be designed to benefit from these highly desirable merits.…”

Section: Introductionmentioning

confidence: 99%

Very Compact Diplexer Based on Dual-Mode Dielectric TM-Mode Resonators

Widaa

Höft

2023

IEEE Microw. Wireless Tech. Lett.

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A very compact in-line C-band diplexer is reported in this paper based on dual-mode dielectric TM-mode resonators in planar coupling configuration. In addition to the advantages of substantial volume-saving and easy assembly, the proposed diplexer features high quality factor, enhanced spurious performance, high-power handling, and efficient tuning process with independent control of each passband. For verification purposes, a C-band diplexer is designed, implemented, and tested. The final assembled diplexer unit has a compact overall volume of 43×40×15.9 mm 3 . It operates at 4.73 GHz and 5.03 GHz with same bandwidth of 24 MHz, an insertion loss better than 0.9 dB, and a return loss higher than 21 dB. Additionally, highpower breakdown analysis shows that the introduced diplexer can handle high levels of input power up to 5200 watts.

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Section: Introductionmentioning

confidence: 99%

Very Compact Diplexer Based on Dual-Mode Dielectric TM-Mode Resonators

Widaa

Höft

2023

IEEE Microw. Wireless Tech. Lett.

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“…However, these structures are difficult to apply to the base transceiver stations. By contrast, multiband cavity filters can be broadly classified as dielectric-loaded filters [4], [5], [6], [7], helical filters [8], waveguide filters [9], [10], [11], [12], [13], [14], [15], and coaxial filters [16], [17], [18], [19], [20], [21], [22]. Despite the size advantage of dielectric-loaded filters, the closer harmonics make it more difficult to achieve large frequency ratios.…”

Section: Introductionmentioning

confidence: 99%

Dual-Narrowband/Wideband Filters Using Modified Coaxial Cavities With Large Frequency Ratios

Zhang

et al. 2022

IEEE J. Microw.

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This article presents two types of dual-narrowband/ wideband filters using modified coaxial cavities with large frequency ratios. The dual-narrowband/ wideband filters mean two dual-band bandpass filters, one of which is a dual-band wideband filter, and the other is a dual-band narrowband filter. The proposed coaxial resonator in the dual-narrowband filter consists of a pair of disk-loaded coaxial stepped impedance resonator (DLCSIR), which provides a large frequency ratio. The frequency ratio of the first two resonant modes of the DLCSIR can be precisely controlled by adjusting the impedance ratios and dimensions of the loading disk. By contrast, the proposed coaxial resonator in the dual-wideband filter is a rectangular coaxial stepped impedance resonator (RCSIR), which has the merits of miniaturized size, large frequency ratio, and convenience for strong coupling. Finally, two second-order dual-narrowband/ wideband filters with large frequency ratios were designed, fabricated, and measured. The exhibited dual-passband performance of the two filters verifies the proposed concept.INDEX TERMS Dual-band filter, large frequency ratio, disk loaded coaxial stepped impedance resonator (DLCSIR), rectangular coaxial stepped impedance resonator (RCSIR).

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“…Considering the above drawbacks of planar and waveguide configurations, dual-band dielectric bandpass filters are getting increasing attention because of their desirable advantages of high Qu, compact size, and compatibility with high-power levels. Couple of dual-band dielectric filters were presented in the open literature using different types of dielectric resonators (DRs) with fixed passbands [3]- [7]. Among all, TM mode dielectric resonators offer more compactness, better spurious performance, and mechanicallystable structures.…”

Section: Introductionmentioning

confidence: 99%

“…This paper introduces a miniaturized reconfigurable dualband dual-mode TM mode dielectric filter. Firstly, a new planar configuration of dual-band TM mode filters is presented [7]. Then, the tuning capabilities of the proposed dual-band filter are explored for the applications of tunable filters.…”

Section: Introductionmentioning

confidence: 99%

“…The design process begins by defining the required specifications of each band (f1, f2) individually, and extracting the corresponding matrixes using the standard synthesis procedure [11]. Then, the overall matrix is optimized with the inclusion of any additional transmission zeros [7], [10]. Afterwards, the required external quality factors (Qext_1, Qext_2) and physical coupling coefficients (K1,3, K2,4) are calculated using:…”

Section: Introductionmentioning

confidence: 99%

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Miniaturized Dual-Band TM-Mode Dielectric Filter and Its Reconfiguration Capabilities

Widaa

Höft

2022

2022 IEEE/MTT-S International Microwave Symposium - IMS 2022

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A new miniaturized C-band dual-band dual-mode filter is reported in this paper using TM mode dielectric resonators. The filter is realized in planar topology to offer easy tuning and assembly for the applications of reconfigurable filters. High isolation between the two channels is obtained through the introduction of an inter-band transmission zero. Also, two asymmetrical transmission zeros are generated to enhance the out-of-band rejections. Both passbands can be tuned either simultaneously at the same time, or independently. A two-pole dual-band dual-mode TM dielectric filter is designed, implemented, and measured with the investigation of its tuning capabilities.

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Miniaturized Dual-Band Dual-Mode TM-Mode Dielectric Filter in Planar Configuration

Cited by 10 publications

References 21 publications

Very Compact Diplexer Based on Dual-Mode Dielectric TM-Mode Resonators

Very Compact Diplexer Based on Dual-Mode Dielectric TM-Mode Resonators

Dual-Narrowband/Wideband Filters Using Modified Coaxial Cavities With Large Frequency Ratios

Miniaturized Dual-Band TM-Mode Dielectric Filter and Its Reconfiguration Capabilities

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