Plumbing wireless phones and apparatus thereof

• US 6,091,971 A
• Filed: 08/18/1997
• Issued: 07/18/2000
• Est. Priority Date: 08/18/1997
• Status: Expired due to Term

• Current Assignee: WSOU Investments, LLC (WSOU Holdings, LLC)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: Jocher, Ronald William
• Primary Examiner(s): Trost, William G.
• Assistant Examiner(s): GELIN, JEAN ALLAND
• Application Number:
  US08/914,132
• Time in Patent Office: 1,065 Days
• Field of Search: 455/15, 455/19, 455/25, 455/82, 455/83, 455/90, 455/107, 455/127, 455/128, 455/129, 455/424, 455/425, 455/523, 455/550, 455/562, 455/575, 455/117, 343/702, 343/714, 439/63, 439/581, 439/916, 439/578, 439/583
• US Class Current: 455/575.5
• CPC Class Codes: H01Q 1/243 with built-in antennas
• CPC Class Codes: H01Q 1/526 Electromagnetic shields
• CPC Class Codes: H04B 1/3833 Hand-held transceivers

Abstract

A cost effective and convenient system for converting a wireless phone that radiates stray RF energy outside of the intended RF transmission path into a wireless phone that confines the RF energy to a shielded RF transmission path. This system will be referred to as "plumbing" a phone. In the plumbing system, a shielded RF adapter contacts the RF output from the printed circuit board (the RF clip in certain embodiments) of the wireless phone. In certain embodiments where the wireless phone is prepared for various tests and/or performance measurements, the plumbing process involves a shielded RF adapter and/or some of the following steps: removing the supplied antenna from the wireless phone, modifying the antenna base if necessary to accommodate the shielded RF adapter, applying a conductive coating on the inside of the phone case to increase RF shielding and installing the shielded RF adapter into the antenna base such that the RF clip of the phone directly contacts an extended center pin of the shielded RF adapter. The shielded RF adapter and the plumbing system provide a shielded RF transmission path having a higher integrity in terms of mechanical strength and electrical performance than previous systems. Additionally, the plumbing system does not require any permanent modification of the printed circuit board of the wireless phone and does not require the use of an expensive shielded box in performing optimization tests. Thus, the plumbing system according to the principles of the present invention reduces the time, costs and resources for providing a wireless phone that confines its RF energy to a shielded RF transmission path.

Claims

1. A method of modifying a wireless phone, said method comprising the steps of:

removing an antenna from an antenna base of the wireless phone;

physically modifying the antenna base to accommodate a shielded RF adapter including forming threads on or in the antenna base;

installing the shielded RF adapter into the antenna base; and

contacting the shielded RF adapter with an RF output of the wireless phone.

2. The method of claim 1, wherein said step of physically modifying further includes the step of:

removing existing threads of the antenna base prior to forming threads on or in the antenna base.

3. The method of claim 2, wherein said step of forming threads further includes the step of:

using a 1/4 inch diameter, 26 threads per inch, tap.

4. The method of claim 2, wherein said step of removing further includes the step of:

using a twist drill bit having a 7/32 inch diameter modified flute for brass material.

5. The method of claim 1, wherein said step of contacting further includes the step of:

contacting directly a contact extension of the shielded RF adapter with an RF clip of the RF output of the wireless phone.

6. The method of claim 5, wherein said step of contacting further includes the step of:

positioning the RF clip to make contact with the contact extension of the shielded RF adapter.

7. The method of claim 6, wherein said step of positioning includes the step of:

bending the RF clip.

8. The method of claim 1, further including the step of:

applying a conductive coating to any unshielded portion of a casing of the wireless phone around the antenna base to increase shielding effectiveness.

9. The method of claim 1, wherein said step of installing includes:

providing an SMA-type RF coaxial bulkhead connector to serve as the shielded RF adapter.

10. The method of claim 9, further including the step of modifying the SMA-type RF coaxial bulkhead connector prior to said step of installing.

11. The method of claim 10, wherein said step of modifying includes removing a portion of the SMA-type RF coaxial bulkhead connector to form an extended center conductor pin at one end of the SMA-type RF coaxial bulkhead connector.