Extended varying angle antenna for electromagnetic radiation dissipation device

• US 8,704,729 B2
• Filed: 07/13/2012
• Issued: 04/22/2014
• Est. Priority Date: 06/26/2008
• Status: Active Grant

• Current Assignee: R2L, Llc
• Original Assignee: R2L, Llc
• Inventors: Tucek, Kevin B, Shanks, Steven C
• Primary Examiner(s): Levi, Dameon
• Assistant Examiner(s): Hu, Jennifer F
• Application Number:
  US13/549,142
• Publication Number:
  US 20120280889A1
• Time in Patent Office: 648 Days
• Field of Search: 343/700.MS, 343/895, 343/702
• US Class Current: 343/895
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/245 with means for shaping the antenna pattern, e.g. in order to protect user against rf exposure
• CPC Class Codes: H01Q 1/36 Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewithH01Q1/08, H01Q1/14 take precedence
• CPC Class Codes: H01Q 9/27 Spiral antennas

Abstract

An extended varying angle antenna is used with an electromagnetic radiation dissipation device to reduce exposure to electromagnetic radiation. The extended antenna captures radiation from an active emission source, such as a transmitting cellular telephone. The device converts the captured radiation into an electric current and dissipates the collected current by operating the dissipation device. The extended antenna is a printed circuit board trace antenna comprising a microstrip having a meandering portion with several serially connected meandering segments and an extended portion. One or more meandering segments include 90-degree bends in the microstrip, and one or more meandering segments include bends of more and less than 90 degrees. The extended portion includes two or more parallel horizontal portions and at least one vertical portion, all connected by 90-degree bends. The extension is connected to the meandering portion or to the dissipation device to provide additional current to the dissipation device.

Claims

1. An extended varying angle antenna that reduces undesired electromagnetic radiation emanating from an active emission source, the antenna comprising a microstrip disposed on a printed circuit board, wherein the microstrip comprises:

a. a first meandering portion with at least one meandering segment having a first horizontal length;

b. a second meandering portion serially connected to the first meandering portion, the second meandering portion having at least one meandering segment having a second horizontal length that is less than the first horizontal length;

c. a third meandering portion serially connected to the second meandering portion, the third meandering portion having at least one meandering segment having a third horizontal length that is more than the second horizontal length; and

d. an extension connected to the third meandering portion;

wherein the first, second and third meandering portions comprise at least three meandering segments and wherein;

i. two or more meandering segments comprise 90-degree bends;

ii. one or more meandering segments comprise bends not equal to 90 degrees;

iii. at least one meandering segment comprising bends not equal to 90 degrees comprises at least one bend greater than 90 degrees and at least one bend less than 90 degrees; and

iv. at least one meandering segment comprising bends equal to 90 degrees comprises three or more bends, each bend being equal to 90 degrees.

2. The device of claim 1 wherein the sum of the lengths of the first, second and third meandering portions of the microstrip is about 3.8 inches.

3. The device of claim 1 wherein the length of the extension is about 2.4 inches.

4. The device of claim 1 wherein the extension further comprises a first horizontal portion having a length of about 1.18 inches and a second horizontal portion having a length of about 0.91 inches.

5. The device of claim 4 wherein the extension further comprises a first vertical portion having a length of about 0.12 inches and a second vertical portion having a length of about 0.15 inches.

6. The device of claim 1 wherein the dissipation assembly comprises one or more of an electrical, mechanical or thermal device.

7. The device of claim 1 wherein the dissipation assembly comprises a light emitting diode.

8. The device of claim 1 wherein the extended varying angle antenna is not electrically connected to the active emission source.

9. The device of claim 1 wherein the active emission source is a cellular telephone.