Wideband Filtering Power Divider With Embedded Transversal Signal-Interference Sections

Jiao, Lingxiao; Wu, Yongle; Liu, Yuanan; Xue, Quan; Ghassemlooy, Zabih

doi:10.1109/lmwc.2017.2758761

Cited by 48 publications

(23 citation statements)

References 7 publications

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“…The two passbands both have the second-order Chebyshev responses, and RL within both passbands is larger than 20 dB, and TZs are 4.3, 5 and 5.7 GHz. The corresponding coupling matrix could be synthesised using the method in [28,29], and it is presented in the equation below: (see (17)) . The properties of resonators are summarised in Table 4, using (2) and (3).…”

Section: Synthesismentioning

confidence: 99%

“…It is found that a transversal filter with high order could be decomposed into a group of sub-filters with the lower order, namely modules, and each module could be individually synthesised on different multi-mode resonators (MMRs). Compared to the above modular techniques and other reported transversal filters [9][10][11][12][13][14][15][16][17][18][19][20][21], the proposed modular technique reveals the following advantages in synthesising filters: i. Flexibility: For a high-order filter, arbitrary number and order of resonators could be grouped to individually form a module.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Modular implementation of transversal filter using transversal matrices and multi‐mode resonators

Guo

Wong³

2019

IET Microwaves, Antennas & Propagation

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This study, for the first time, presents an attractive property of transversal filters: modularity. That is, for a specified Nth‐order transversal filter, the N resonators could be divided into a number of modules and each module comprises arbitrary number and order of resonators, which could be implemented on a multi‐mode resonator. Thus, an Nth‐order filter could be synthesised by separately and independently synthesising different modules with lower orders, thus providing great flexibility, simplification and convenience in filter design. This property is realised by taking advantage of the independence between paths of transversal filters, which is guaranteed by the unique array of resonators of transversal filters. A class of transversal filter including bandpass filters and multi‐band filters are synthesised, fabricated, and measured. The synthesised results, along with the good measured results, verify the validity of the modularity property of transversal filters.

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Section: Synthesismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modular implementation of transversal filter using transversal matrices and multi‐mode resonators

Guo

Wong³

2019

IET Microwaves, Antennas & Propagation

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“…parallel-coupled lines connected to two separate lines of the T-junction, and stepped-impedance open-ended stubs are placed to introduce two transmission zeros at each side of passband. In [4], transversal signal-interference sections are cascaded with Wilkinson power divider to construct a FPD. In addition, it's the second approach for the construction of FPDs to substitute the quarter-wavelength lines in Wilkinson power divider with filtering sections.…”

Section: Introductionmentioning

confidence: 99%

Novel Wideband Microstrip Filtering Power Divider Using Multiple Resistors for Port Isolation

et al. 2019

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In this paper, a novel wideband filtering power divider with third-order quasi-Elliptic bandpass response is proposed. Its physical mechanism is revealed by the lumped-element equivalent circuit, such as how its transmission poles and zeros are formed. The design of the proposed filtering power divider can be simplified as its even-mode model can be synthesized by conventional filter synthesis technique, and then the initial structure parameters can be analytically determined. Owing to the fact that as many as three resistors are joined, high isolation can be achieved between two output ports. To demonstrate its good performance, an example was designed, fabricated, and measured, whose center frequency is 1.99 GHz and 3-dB fractional bandwidth is 43.7%. Moreover, as great as 34 and 28 dB out-of-band suppression can be achieved in the lower and upper stopbands, respectively. The isolation between two output ports is better than 20 dB for a wide frequency range. INDEX TERMS Elliptic bandpass response, filtering power divider, lumped-element equivalent circuit, isolation.

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“…Therefore, filtering PDs were born to tackle this problem. 6 Recently, various techniques have been proposed to design high-performance filtering PDs, including parallel coupled line topologies, [7][8][9][10][11] substrate integrated waveguide 12 and signal-interference theory, 13 where the coupled line structures have been widely used in the design of PDs to realize the filtering characteristics of interest with relatively compact size. In Reference 8, a high-performance filtering PD using multiple pairs of coupled lines and open stubs is presented, where good roll-off rates can be obtained because of multiple transmission zeros (TZs).…”

Section: Introductionmentioning

confidence: 99%

Wilkinson filtering power divider using coupled lines and T‐shaped stub

2019

Micro & Optical Tech Letters

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A new Wilkinson filtering power divider (PD) with high performance has been presented. By employing four pairs of parallel‐coupled lines and a T‐shaped stub to construct the filtering PD, sharp roll‐off skirts and high stopband rejections can be achieved with three transmission poles and six transmission zeros. Theoretical deduction is presented to verify the proposed structure. For demonstration, a filtering PD example with center frequency of 2 GHz and 3‐dB fractional bandwidth of 48% is fabricated and measured. It is shown that the measured minimum insertion loss within the passband is less than 0.4 dB. The lower stopband rejection of over 17 dB and upper stopband rejection of more than 23 dB from 2.7 to 4.9 GHz can be achieved. The measured isolations between two output ports are greater than 20 dB within the passband.

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Wideband Filtering Power Divider With Embedded Transversal Signal-Interference Sections

Cited by 48 publications

References 7 publications

Modular implementation of transversal filter using transversal matrices and multi‐mode resonators

Modular implementation of transversal filter using transversal matrices and multi‐mode resonators

Novel Wideband Microstrip Filtering Power Divider Using Multiple Resistors for Port Isolation

Wilkinson filtering power divider using coupled lines and T‐shaped stub

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