English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

This paper describes the implementation of a miniaturized quad flat no-lead (QFN)-packaged bandpass filter (BPF) with a combination of an intertwined circular spiral inductor and two types of integrated center-located capacitors using gallium-arsenide-based integrated passive device (IPD) fabrication technology. Air-bridge structures were introduced into the outer circular spiral inductor to save space and to provide the filter with a compact chip area of <inline-formula> <tex-math notation="LaTeX">$1192.5\times 1012.7 \,\,\mu \text{m}^{2}$ </tex-math></inline-formula>. An equivalent circuit was modeled, the current density and variable dimensional parameters were simulated, and the fabrication process was introduced to achieve a better understanding of the IPD BPF. The proposed device was packaged using the QFN-packaging technology and was measured to possess a single passband with a central frequency of 1.91 GHz (return loss: 28.8 dB) and a fractional bandwidth of 72.69% (insertion loss: 0.62 dB). One transmission zero was obtained on the right side of the passband at 4.78 GHz with an amplitude of 35.95 dB. The fabricated BPF can be used in various <inline-formula> <tex-math notation="LaTeX">${L}$ </tex-math></inline-formula>-band applications, such as mobile service, satellite navigation, telecommunications, and aircraft surveillance, due to its miniaturized chip size and high-performance characteristics.

ieee access

QFN-Packaged Bandpass Filter With Intertwined Circular Spiral Inductor and Integrated Center-Located Capacitors Using Integrated Passive Device Technology