Microstrip Diplexer Constructed With New Types of Dual-Mode Ring Filters

Peng, Han-Sam; Chiang, Yuan‐Cheng

doi:10.1109/lmwc.2014.2365740

Cited by 67 publications

(56 citation statements)

References 9 publications

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“…To protect the receiver from the leakage of high power transmitter and reduce the channel interference, the diplexer is often required to have a high isolation between the Tx and Rx ports. A lot of efforts have been made on increasing the isolation in diplexers . The common approach is to combine the bandpass filters (BPFs) through a 3‐port impedance matching network, usually in the form of transmission‐line based junctions that occupy a considerable footprint .…”

Section: Introductionmentioning

confidence: 99%

“…A lot of efforts have been made on increasing the isolation in diplexers . The common approach is to combine the bandpass filters (BPFs) through a 3‐port impedance matching network, usually in the form of transmission‐line based junctions that occupy a considerable footprint . An alternative approach is to employ common resonators to replace the matching networks but with limited effect on the isolation enhancement .…”

Section: Introductionmentioning

confidence: 99%

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High isolation 4‐port diplexer based on double‐sided parallel‐strip lines

Wang²,

Hua

et al. 2018

Micro & Optical Tech Letters

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A high isolation 4‐port diplexer implemented using double‐sided parallel‐strip lines (DSPSLs) is presented in this letter. Two back‐to‐back 3‐port diplexers and a 180° phase shifter are employed to construct the proposed device. The DSPSL structure enables a compact phase shifter without incurring any extra circuit footprint. The 4‐port circuit topology suppresses the leakage between the 2 channels by signal cancellation, resulting in significantly improved channel isolation. For demonstration, a 4‐port diplexer with operating frequencies of 1.85 and 2.1 GHz is designed, fabricated and measured. The experimental results show that the 4‐port diplexer has good in‐band performance and high isolation of 50 and 51 dB. This is an improvement of over 23 dB compared with the conventional 3‐port diplexer.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

High isolation 4‐port diplexer based on double‐sided parallel‐strip lines

Wang²,

Hua

et al. 2018

Micro & Optical Tech Letters

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“…The diplexer, as one of the essential components in transceivers or other wireless communications systems, can greatly affect system performance. Many efforts have been made to investigate different diplexer configurations , but the common problem they encounter is that their volumes are large. Unlike the conventional diplexers, CRLH‐TL‐based ones have a considerable advantage in miniaturization.…”

Section: Introductionmentioning

confidence: 99%

Compact diplexer using short stub-loaded composite right/left-handed resonators

et al. 2017

Microw. Opt. Technol. Lett.

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A new compact short stub‐loaded composite right/left‐handed (SSL‐CRLH) resonator is presented. The resonance properties of the proposed SSL‐CRLH resonator are deduced by odd‐ and even‐mode method. Based on SSL‐CRLH resonator, the designed bandpass filter not only realizes size miniaturization but also has a tunable center frequency and bandwidth by changing the length of the CRLH‐TL unit cell and the short stub, respectively. Finally, a compact diplexer using two size‐different SSL‐CRLH resonators with center frequencies at 2.6 and 2.9 GHz, respectively, has been fabricated and tested. Good agreement between simulated and measured results validates the design concept. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1470–1474, 2017

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“…In microwave system, it is challenging to design a device at low cost and high performance. The design of different filters and diplexers was discussed in [3][4] which conventional diplexers offer low cost (microstrip structure) but give poor isolation performance (worse than 20dB) and high losses. Consequently, a new technique to improve signal isolation while keeping low signal losses is required.…”

Section: Introductionmentioning

confidence: 99%

Novel RF interference rejection technique using a four-port diplexer

Konpang

Sandhu

Somjit

et al. 2016

2016 46th European Microwave Conference (EuMC)

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Abstract-A novel RF interference rejection technique using four-port network is presented in this paper by using two diplexers combined together. This technique offers the signal isolation of 68.46 dB between transmitter and receiver module, which is the best figure ever reported. The four-port network exploits both high and low-Q factor filters for the cost reduction. The design tolerance with phase deviation between 180 o and 183 o of four-port network was investigated and the novel concept still has signal isolation (S32) of better than 65.47 dB, which is still superior compared to the existing diplexer. Finally, RF interference rejection technique can be used in wireless communication systems whereas small size, low losses and low complexity are required.

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Microstrip Diplexer Constructed With New Types of Dual-Mode Ring Filters

Cited by 67 publications

References 9 publications

High isolation 4‐port diplexer based on double‐sided parallel‐strip lines

High isolation 4‐port diplexer based on double‐sided parallel‐strip lines

Compact diplexer using short stub-loaded composite right/left-handed resonators

Novel RF interference rejection technique using a four-port diplexer

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