A miniaturized lowpass bandpass diplexer with high isolation

Heshmati, Hossein; Roshani, Sobhan

doi:10.1016/j.aeue.2018.02.004

Cited by 28 publications

(22 citation statements)

References 12 publications

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“…Meanwhile, to design a lowpassbandpass diplexer, two different types of resonators should be designed to create two lowpass and bandpass channels. Four lowpass-bandpass diplexers are designed in [7][8][9][10]. However, all of these lowpass-bandpass diplexers occupy a large implementation area.…”

Section: Introductionmentioning

confidence: 99%

“…However, all of these lowpass-bandpass diplexers occupy a large implementation area. The other common disadvantages of the reported lowpass-bandpass diplexers in [7][8][9][10] are their large insertion and return losses at both channels and low selectivity at the lowpass channels. Accordingly, all proposed lowpass-bandpass diplexers in [7][8][9][10] have relatively low performance.…”

Section: Introductionmentioning

confidence: 99%

“…The other common disadvantages of the reported lowpass-bandpass diplexers in [7][8][9][10] are their large insertion and return losses at both channels and low selectivity at the lowpass channels. Accordingly, all proposed lowpass-bandpass diplexers in [7][8][9][10] have relatively low performance. In [7], microstrip T-shape and Z-shape resonators were utilised to create lowpass channel, while two microstrip coupled open stubs were used to obtain a bandpass channel.…”

Section: Introductionmentioning

confidence: 99%

“…Accordingly, all proposed lowpass-bandpass diplexers in [7][8][9][10] have relatively low performance. In [7], microstrip T-shape and Z-shape resonators were utilised to create lowpass channel, while two microstrip coupled open stubs were used to obtain a bandpass channel. This diplexer could suppress the harmonics well.…”

Section: Introductionmentioning

confidence: 99%

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Design of a high–performance lowpass–bandpass diplexer using a novel microstrip structure for GSM and WiMAX applications

Hayati

Rezaei

Noori

2019

IET Circuits, Devices & Systems

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In this work, a lowpass-bandpass diplexer is proposed based on a novel microstrip structure. This diplexer includes two lowpass and bandpass filters integrated by a simple transmission line. The lowpass channel has a cutoff frequency at 1.88 GHz, which makes it suitable for GSM applications. The resonance frequency of the bandpass channel is 3.56 GHz for IEEE 802.16 WiMAX applications. In comparison with the previously reported lowpass-bandpass diplexers, the proposed design has the lowest insertion and return losses at both channels while it occupies the most compact implementation area of 0.03 λg 2. The designed diplexer can suppress the harmonics up to 4.45F C with a maximum harmonic level of −20 dB, where F C is the cutoff frequency of the lowpass channel. The lowpass channel has a very sharp roll-off of ξ = 220, while the bandpass channel has a high selectivity with a high fractional bandwidth of 23.8%. To verify the design method and simulation results, the designed diplexer is fabricated and measured. The simulated and measured results are in a good agreement.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Design of a high–performance lowpass–bandpass diplexer using a novel microstrip structure for GSM and WiMAX applications

Hayati

Rezaei

Noori

2019

IET Circuits, Devices & Systems

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show abstract

“…Diplexer with high isolation is used in conjunction with a single antenna for transmission and reception of radio signals. But the transmission and reception frequency bands are different.…”

Section: Introductionmentioning

confidence: 99%