Invention Grant
- Patent Title: Distributed-element filter for mmWave frequencies
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Application No.: US17411892Application Date: 2021-08-25
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Publication No.: US12009849B2Publication Date: 2024-06-11
- Inventor: Xiaofang Mu , Bo Zhang , Mingjuan Zhu , Chi V. Pham , Berke Cetinoneri , Timothy B. Ogilvie
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: FLETCHER YODER PC
- Main IPC: H04B1/04
- IPC: H04B1/04 ; H04B1/00 ; H04B1/52

Abstract:
Frequency-filtering circuitry is disclosed that rejects power of a wireless signal having an undesired frequency while causing a decreased power loss to a wireless signal having a desired frequency using distributed elements, rather than lumped elements. The frequency-filtering circuitry may reject at least 5 decibels of power of a wireless signal having a frequency over 32 gigahertz, while causing a power loss of at most 1.1 decibels to a wireless signal having a frequency lower than 29.5 gigahertz. The frequency-filtering circuitry may include a main branch, a first parallel branch coupled and parallel to the main branch via a first connecting trace, and a second parallel branch coupled and parallel to the main branch via a second connecting trace. The first connecting trace intersects the main branch and the first parallel branch, and the second connecting trace intersects the main branch and the second parallel branch.
Public/Granted literature
- US20230064458A1 DISTRIBUTED-ELEMENT FILTER FOR MMWAVE FREQUENCIES Public/Granted day:2023-03-02
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