EXHIBIT B

Case 2:23-cv-00220-JRG Document 1-2 Filed 05/18/23 Page 1 of 22 PageID #: 31
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EVIDENCE OF USE FOR U.S. PATENT NO. 8,610,573

Title: Radio frequency module and methods of transmitting/receiving data

Application No.: US 12/558,484

Filing Date: September 11, 2009

Issue Date: December 17, 2013

Accused Product:

Source: https://www.murata.com/en-us/products/connectivitymodule/proprietary-fhss

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Source: https://www.murata.com/en-us/products/connectivitymodule/proprietary-fhss/overview/lineup/dnt24ca

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Evidence of Use

Claim Language Evidence of Infringement

1. A radio frequency module 

comprising:

Murata Electronics provides DNT24CA FHSS Transceiver module (i.e., “radio frequency module”) with 2.4 GHz 

frequency hopping module for the data communication.

Source: https://www.murata.com/en-us/products/connectivitymodule/proprietary-fhss/overview/lineup/dnt24ca

Radio frequency module

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Claim Language Evidence of Infringement

Source: https://www.murata.com/en-us/products/connectivitymodule/proprietary-fhss

Source: https://www.murata.com/en-us/products/connectivitymodule/proprietary-fhss/overview/lineup/dnt24ca

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Claim Language Evidence of Infringement

a base member including a 

printed circuit board having a 

first surface and a second 

surface;

Murata Electronics DNT24CA FHSS Transceiver module includes a printed circuit board (PCB) that has a first 

and a second surface. 

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 1 of 7) 

Base member having printed circuit board

Second surface on back side

First surface

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Claim Language Evidence of Infringement

Second surface

Base member having printed circuit board

First surface

Base member having printed circuit board

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Claim Language Evidence of Infringement

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 6 of 7) 

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Claim Language Evidence of Infringement

a transceiver assembly 

located on the printed circuit 

board and including:

a transceiver; and

Murata DNT24CA module deployed with 2.4 GHz transceiver module (i.e., “transceiver”) in a transceiver 

assembly.

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 3 of 7) 

Transceiver

Transceiver assembly on PCB

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Claim Language Evidence of Infringement

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1) 

Transceiver

Transceiver assembly on PCB

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Claim Language Evidence of Infringement

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 3 of 7) 

Case 2:23-cv-00220-JRG Document 1-2 Filed 05/18/23 Page 11 of 22 PageID #: 41
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Claim Language Evidence of Infringement

a matching/filtering network 

having first and second ends;

Murata DNT24CA module includes a matching/filtering network circuit. The primary characteristic of a matching 

network is to maximize power transfer from the source (transceiver) to load (antenna). Therefore, RF design 

demands that a matching/filtering network block be placed between the chip and the antenna, forming a filter and 

differential antenna connection between the IC transceiver and the antenna. The matching/filtering network 

comprises passive components such as inductors and capacitors (shown in patent specification provided below).

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1) 

Matching/filtering network

First end

Second end

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Claim Language Evidence of Infringement

Source: https://www.allaboutcircuits.com/textbook/radio-frequency-analysis-design/selectedtopics/understanding-matching-networks/ 

Patent Specification: 

Source US8610573, col 4, lines 61-66

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Claim Language Evidence of Infringement

the matching/filtering network 

having a plurality of passive 

series connected electrical 

components in a linear

arrangement, with the first 

end thereof electrically 

connected to the transceiver;

Murata DNT24CA module’s matching/filtering network forms a linear arrangement with the components where the 

first end is connected to 2.4 GHz transceiver module (i.e., “transceiver”). RF modules. The matching/filtering 

networks comprise passive components such as inductors and capacitors. RF modules usually comprise passive 

filters which comprise passive components such as resistors, capacitors, and inductors. Further, at least some of 

the passive components are in a linear arrangement with two ends of a component each connected to a different 

component (series connection) rather than both ends being connected to the same component (parallel 

connection). 

Matching/filtering network

First end connected to transceiver

Plurality of passive components

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Claim Language Evidence of Infringement

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1) 

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Claim Language Evidence of Infringement

a ground plane formed on the 

first surface and surrounding 

at least a substantial portion 

of the transceiver assembly;

Murata DNT24CA module includes a metal segment (i.e., “ground plane”) on the PCB surface that 

surrounds a portion of the transceiver assembly. 

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1) 

Ground plane on the first surface

Surrounding 

Transceiver assembly

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Claim Language Evidence of Infringement

a radio frequency shield 

electrically coupled to the 

ground plane and covering at 

least a substantial portion of 

the transceiver assembly;

Murata DNT24CA module includes a shield (i.e., “radio frequency shield”) that covers the transceiver assembly

and is soldered to the metal segment (i.e., “ground plane”). 

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1) 

Ground plane

Transceiver assembly

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Claim Language Evidence of Infringement

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 1 of 7) 

Radio frequency shield covers portion of the transceiver assembly

Electrically coupled to the ground plane

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Claim Language Evidence of Infringement

a chip antenna located on the 

first surface of the printed 

circuit board outside of the 

shield and extending 

generally parallel with the 

matching/filtering network; 

and

Murata DNT24CA module includes a dielectric chip antenna outside of the shield placed on the first surface of 

the PCB. The chip antenna extends in parallel with the inductor and capacitor network (i.e., “matching/filtering 

network”). The top view of the module with the shield removed is provided below which depicts that the 

longitudinal directions of the chip antenna and the matching/filtering network extend parallel to each other. 

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 1 of 7) 

Chip antenna on first surface of PCB

Radio frequency shield

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Claim Language Evidence of Infringement

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1) 

Extending parallel

Matching/filtering network

Chip antenna

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Claim Language Evidence of Infringement

Source: https://www.murata.com/-

/media/webrenewal/products/connectivitymodule/asset/pub/rfm/data/dnt24ca.ashx?la=enus&cvid=20210615064715000000 (Page 1 of 7)

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Claim Language Evidence of Infringement

a radio feed point extending 

between the chip antenna 

and the second end of the 

matching/filtering network, the 

chip antenna together with 

the matching/filtering network 

and the feed point forming a 

generally U-shape.

Murata DNT24CA module has a feed point between the chip antenna and the second end of the matching/filtering

network. This arrangement forms a U-shape with the components.

Source: https://fccid.io/HSW-DNT24/Internal-Photos/Internal-Photos-2552785.pdf (Page 1 of 1)

Chip antenna

Forming U-shape Matching/filtering network

Second end

Radio feed point

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