Chi D Pham

US Patent:

20230064458, Mar 2, 2023

Filed:

Aug 25, 2021

Appl. No.:

17/411892

Inventors:

- Cupertino CA, US
Bo Zhang - San Jose CA, US
Mingjuan Zhu - Saratoga CA, US
Chi V. Pham - San Jose CA, US
Berke Cetinoneri - Palo Alto CA, US
Timothy B. Ogilvie - San Jose CA, US

International Classification:

H04B 1/04
H04B 1/00
H04B 1/52

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.