PCB Embedded 2.4GHz Compact Bandpass Filter with Two Finite Transmission Zeros

Lee, S.J.; Park, J.Y.

doi:10.1109/apmc.2007.4554838

Cited by 8 publications

(2 citation statements)

References 10 publications

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“…To overcome some drawbacks of LTCC packaging technology, the designed passive circuit was fully embedded into a multilayered organic packaging substrate. To improve their performance characteristics and reduce its size/volume, vertically stacked spiral high Q inductors and high dielectric BaTiO3 MIM composite capacitors were newly applied [7,8]. Finally, passive quintplexer module has been demonstrated by assembling fabricated passive triplexer with DCN and PCS duplexers onto PCB evaluation board.…”

Section: Acknowledgmentsmentioning

confidence: 99%

High‐level integrated passive triplexer and quintplexer module in organic SOP technology

Lim

Park

2009

Micro & Optical Tech Letters

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In this letter, fully embedded passive triplexer and quintplexer module into organic packaging substrate were presented for US CDMA handset applications. First, the passive triplexer was implemented by embedding all passive elements and circuits into multilayered organic packaging substrate. The passive triplexer circuit with eight passive elements was comprised of a diplexer, parallel resonator, and matching network. The size of the fabricated triplexer was 3 mm × 4 mm. The compact CDMA quintplexer module was fabricated by assembling the embedded passive triplexer with DCN and PCS duplexers on FR‐4 evaluation board. A fabricated quintplexer module exhibited an insertion loss of −2.2 dB/−2.9 dB at DCN Tx/Rx band, −3 dB/−2.7 dB at PCS Tx/Rx band, and −2.4 dB at GPS Rx band, respectively. In addition, the stop‐band attenuation is −40 dB/−44 dB at DCN Tx/Rx band, −55 dB/−45 dB at PCS Tx/Rx band, and −37 dB at GPS Rx band, respectively. Measured isolations in each Tx band are −62 dB/−58 dB at GPS/PCS of DCN band, −30 dB/−36 dB at DCN/PCS of GPS band, and −45 dB/−38 dB at DCN/GPS of PCS band. It is comparatively much higher than the matching circuit type quintplexer module, which indicates that the embedded triplexer is strongly applicable for improving the interferer blocking. The simulated performance characteristics were agreed with the simulated ones. ©2009 Wiley Periodicals, Inc. Microwave Opt Technol Lett 52: 302–306, 2010; Published online in Wiley InterScience (www.interscience.wiley.com). DOI 10.1002/mop.24923

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Section: Acknowledgmentsmentioning

confidence: 99%

High‐level integrated passive triplexer and quintplexer module in organic SOP technology

Lim

Park

2009

Micro & Optical Tech Letters

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“…Its restricted bandwidth and necessity of using additional external matching elements can be noticed as the main usual disadvantages of the SAW filters. The LTCC technology, in turn, allows to use its high integration possibilities and there are a plenty of bandpass filters, integrated in the LTCC substrate, have been already described [2][3][4][5][6]. But due to comparatively not a high Q factor of resonators, realized within LTCC substrate, the selectivity of such filters could be not enough.…”

Section: Introductionmentioning

confidence: 99%

Compact low-loss 2.4GHz ISM-band SAW bandpass filter on the LTCC substrate

Novgorodov¹,

Freisleben²,

Hornsteiner³

et al. 2009

2009 Asia Pacific Microwave Conference

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This paper describes a design of a surface acoustic wave (SAW) ladder-type bandpass filter (BPF) for 2.4-2.5GHz ISM-band, based on the low temperature co-fired ceramic (LTCC) substrate, which can be used in 802.11b/g wireless LAN and Bluetooth applications. It obtains an excellent state-of-the-art performance in the ultra small package. The proposed architecture is based on a combination of SAW and low temperature co-fired ceramic (LTCC) technologies, where the multilayer LTCC substrate is used for integration of matching and passband-driving elements and for obtaining additional transmission zeros. It is comprised of three series and two parallel SAW resonators, realized on the LiTaO 3 piezoelectric substrate and connected accordingly to a ladder-type T-topology circuit design, and an additional resonator to obtain an attenuation at 2.57-2.62 GHz IMT-E (TDD) band. Two input/output matching inductors and three additional inductors, permitting to obtain a sufficient suppression level at 2.11-2.17 GHz UMTS (DL) band and harmonics, are completely integrated within ceramic.The described bandpass filter has ultra small dimensions of 1.1 x 1.4 x 0.9 mm, very low insertion losses of -1.5 dB max in the passband. This fully matched SAW bandpass filter has achieved excellent selectivity performance with the up-to-date smallest package size.Index Terms -Bandpass filter (BPF), ladder-type, surface acoustic wave (SAW), coexistence, low temperature co-fired ceramic (LTCC), wireless local area network (WLAN), systemin-package (SIP).

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Fully embedded UWB filter into organic packaging substrate

Lim

Park

2009

2009 59th Electronic Components and Technology Conference

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PCB Embedded 2.4GHz Compact Bandpass Filter with Two Finite Transmission Zeros

Cited by 8 publications

References 10 publications

High‐level integrated passive triplexer and quintplexer module in organic SOP technology

High‐level integrated passive triplexer and quintplexer module in organic SOP technology

Compact low-loss 2.4GHz ISM-band SAW bandpass filter on the LTCC substrate

Fully embedded UWB filter into organic packaging substrate

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