Design and Simulation of Band 40 RF SAW Ladder-Type Filter

Devaskar, Aditya Ravindra; Agarwal, Vanita; Kulkarni, Vinay

doi:10.1109/icse56004.2022.9863187

Cited by 3 publications

(2 citation statements)

References 9 publications

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“…In recent years, the ladder-type filter and DMS have been commonly used. The ladder-type filter has good out-of-band rejection and insertion loss [ 12 ]. Another advantage of the ladder-type filter is that the power-handling ability is stronger than other structures [ 13 ].…”

Section: Duplexer and Leakage Signalmentioning

confidence: 99%

A Phase Canceling Technique to Improve SAW Duplexer Isolation

Tao

Tang²,

Zou

et al. 2023

Micromachines

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Spectrum resources are becoming increasingly crowded, and the isolation interval between different systems is getting smaller and smaller. This puts forward higher requirements for the duplexer. The duplexer is an important part of the radio frequency front end, and the isolation requirement is becoming higher. This paper presents a phase canceling circuit to improve the performance of the duplexer to meet the requirement of the communication system for isolation. A phase canceling circuit is an effective method to enhance the isolation through use of a surface acoustic wave (SAW) on-chip circuit. It contains a duplexer and a branch. The branch is designed for diminishing the leakage signal of the duplexer. Compared with the leakage signal, the branch consists of two attenuators and a phase shifter to generate a signal which has equal extent and reverse phase. As a result, this method is capable of increasing the isolation of band 5 by 12 dB in the downlink frequency. Meanwhile, it neither affects other factors, such as insertion loss or return loss, nor increases the size of the chip. The phase canceling circuit is expected to promote the quality of duplexer to satisfy the strict requirements in 4G and 5G systems.

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Section: Duplexer and Leakage Signalmentioning

confidence: 99%

A Phase Canceling Technique to Improve SAW Duplexer Isolation

Tao

Tang²,

Zou

et al. 2023

Micromachines

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“…It has the advantages of high sensitivity, low cost, low power consumption, miniaturization and direct frequency signal output. With the increasing demand for miniaturized, low power consumption and highly integrated mobile devices, the Surface Acoustic Wave (SAW) filters are widely used [ 1 ].In recent years, there have been many commercial SAW filters on the market, e.g., (1) 42° YX Cut LiTaO 3 SAW [ 2 ]; (2) Incredible High-Performance SAW (I.H.P SAW) [ 3 , 4 , 5 , 6 , 7 ]; (3) 128° YX Cut LiNbO 3 Temperature Compensate SAW [ 8 ]. The I.H.P.…”

Section: Introductionmentioning

confidence: 99%

Improvement of YX42° Cut LiTaO3 SAW Filters with Optical Proximity Effect Correction Method

Luo

Zou

Yang³

et al. 2023

Micromachines

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Due to the influence of the optical proximity effect (OPE), it is easy for a pattern of photoresistance to be inconsistent with a design pattern, thus damaging the performance of a SAW resonator. To solve this problem, this paper proposes an optimization method for SAW filters based on optical proximity correction (OPC). This method can avoid the tip discharge problem of SAW filters by suppressing the problem of rounding and shrinking of dummy electrode and electrode tail caused by OPE. This method increases the quality factor (Q) of the SAW resonator and thus decreases the insertion loss of the SAW filter. The filter increases the bandwidth by 1.8 MHz at −1.5 dB after applying the OPC method. Additionally, it improves the stability of the filter under high power conditions.

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