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Passive Filters01:27

Passive Filters

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Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...
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A X-Band Integrated Passive Device Structure Based on TMV-Embedded FOWLP.

Jiajie Yang1, Lixin Xu1, Xiangyu Yin2

  • 1School of Mechatronical Engineering, Beijing Institute of Technology, Beijing 100081, China.

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Summary
This summary is machine-generated.

This study presents an integrated passive device (IPD) for X-band FMCW radar using fan-out wafer-level packaging (FOWLP). The novel design and testing demonstrate successful miniaturization for radar applications.

Keywords:
antenna-in-package (AiP)fan-out wafer-level packageintegrated passive devicethrough-mold viaultra-thin

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Area of Science:

  • Electrical Engineering
  • Microwave Engineering
  • Semiconductor Packaging

Background:

  • Integrated Passive Devices (IPDs) are crucial for radar systems.
  • Fan-out Wafer-Level Packaging (FOWLP) offers miniaturization potential.
  • X-band FMCW radar requires compact and efficient passive components.

Purpose of the Study:

  • To fabricate and test an IPD structure for X-band FMCW radar using FOWLP.
  • To enhance IPD performance by incorporating a transition line structure.
  • To propose a simplified testing method for dual-port structures.

Main Methods:

  • Fabrication of an IPD structure with a transition line for impedance matching.
  • Implementation of a vertical soldered SubMiniature Push-On Micro (SMPM) interface testing method.
  • Performance characterization including bandwidth, isolation, and gain.

Main Results:

  • The fabricated IPD structure measures 16.983 × 24.099 × 0.56 mm³.
  • Operational bandwidth achieved is 7.66% at 8.5 GHz center frequency.
  • Maximum isolation reached 33.9 dB, with a 1.76% bandwidth for >20 dB isolation.

Conclusions:

  • The FOWLP process is feasible for miniaturizing X-band FMCW radar antennas and IPDs.
  • The developed IPD structure demonstrates promising performance for radar applications.
  • The proposed testing method simplifies evaluation of dual-port structures.