EXHIBIT B

Case 2:23-cv-00242-JRG Document 1-2 Filed 05/27/23 Page 1 of 14 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.raytac.com/product/ins.php?index_id=111

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Evidence of Use

Claim Language Evidence of Infringement

1. A radio frequency module 

comprising:

Raytac Corporation provides MDBT50-512K Bluetooth low energy module (i.e., “radio frequency module”)

deploying Nordic nRF52833 solution.

Source: https://www.raytac.com/product/ins.php?index_id=111

Source: https://www.raytac.com/product/ins.php?index_id=111

Radio frequency module

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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;

Raytac MDBT50-512K module includes a printed circuit board (PCB) that has a first and a second surface. 

Source: https://www.raytac.com/product/ins.php?index_id=111

Base member

Second surface on back side

First surface

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Claim Language Evidence of Infringement

a transceiver assembly 

located on the printed circuit 

board and including:

a transceiver; and

Raytac MDBT50-512K module deployed with Nordic nRF52833SoC solution (i.e., “transceiver”).

Source: https://fccid.io/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4) 

Source: https://www.raytac.com/product/ins.php?index_id=111

Transceiver

Transceiver assembly

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Claim Language Evidence of Infringement

a matching/filtering network 

having first and second ends;

Raytac MDBT50-512K module includes a matching/filtering network comprising passive components. The primary 

characteristic of a matching network is to maximize power transfer from the source (transceiver) to load (antenna). 

The matching/filtering network comprises passive components such as inductors and capacitors (shown in patent 

specification provided below).

Source: https://fccid.io/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4) 

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

Matching/filtering network

First end

Second end

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Claim Language Evidence of Infringement

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;

Raytac MDBT50-512K module’s matching/filtering network comprises some passive components forming a linear 

arrangement where the first end is connected to Nordic nRF52833SoC solution (i.e., “transceiver”). The 

matching/filtering network comprises passive components such as inductors and capacitors. Further, at least a 

plurality 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 the two ends of the component being connected to the same 

component (parallel connection).

Source: https://fccid.io/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4) 

Matching/filtering network

Plurality of passive components

First end connected to transceiver

Transceiver

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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;

Raytac MDBT50-512K module includes metal segment (i.e., “ground plane”) on the PCB surface surrounding 

portion of the transceiver assembly.

Source: https://fccid.io/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4) 

Ground plane on the first surface 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;

Raytac MDBT50-512K 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/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4) 

Radio frequency shield

Ground plane

Transceiver assembly

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Claim Language Evidence of Infringement

Source: https://www.raytac.com/product/ins.php?index_id=111

Radio frequency shield

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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

Raytac MDBT50-512K module includes chip antenna outside the shield in the PCB. The antenna extends in 

parallel with the matching/filtering network.

Source: https://www.raytac.com/product/ins.php?index_id=111

Source: https://www.raytac.com/product/ins.php?index_id=111

Chip antenna

Radio frequency shield

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Source: https://fccid.io/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 2 of 4)

Source: https://fccid.io/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4)

Extending parallel

Matching/filtering network

Chip antenna

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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.

Raytac MDBT50-512K 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/SH6MDBT50/Internal-Photos/STC-Internal-Photo-pdf-5001709.pdf (Page 1 of 4)

Radio feed point

Matching/filtering network

Second end

Chip antenna Forming U-shape

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