Communications: radio wave antennas – Antennas – Active sleeve surrounds feed line
Reexamination Certificate
1999-12-03
2001-08-28
Wong, Don (Department: 2821)
Communications: radio wave antennas
Antennas
Active sleeve surrounds feed line
C343S791000
Reexamination Certificate
active
06281856
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention generally relates to an antenna made of coaxial cables, and in particular to a simplified method for making the coaxial cable antenna and the antenna so made.
2. The Prior Art
Wireless connection between information appliances, such as notebook computers, and network systems is becoming a modem trend for information appliances. An antenna is required for facilitating wireless connection. Since the information appliances usually have a small size, a conventional antenna occupying a great amount of space is not suitable for such an application. Thus an antenna made of coaxial cables that are widely used in information appliances is prevailing. An coaxial cable antenna may comprise at least one coaxial cable having a first end connected to a signal processing circuit of an information appliance and a second end exposed for receiving/transmitting electromagnetic signals.
A coaxial cable usually comprises a core conductor surrounded by an inner dielectric layer, a braided shield surrounding the inner dielectric layer and an insulative jacket surrounding the braided shield. To serve as an antenna, two conductors carrying data signal and grounding signal are required. The braided shield and the core conductor of a coaxial cable must be separated along a predetermined length at the exposed second end thereof. A conventional way to form the antenna is to remove a predetermined length of the jacket and manually detaching strands that make the braided shield from the inner dielectric layer and separating the strands from each other. The strands are bent in a transverse direction and then twisted together to form a grounding signal conductor, while the core conductor serves as a data signal conductor. Manually separating the strands one by one is a time-consuming and laborious job hindering mass production of the cable antennas.
SUMMARY OF THE INVENTION
Thus, an object of the present invention is to provide an efficient and simplified method for making cable antennae.
Another object of the present invention is to provide a method for mass-producing cable antennae.
A further object of the present invention is to provide a cable antenna so made.
To make a cable antenna in accordance with the present invention, a circuit board is provided with two antenna cables and a coupling cable soldered thereto. Each of the antenna cables has a remote free end wherein an outer jacket is removed along a predetermined first length measured from the free end to expose a braided shield. A predetermined second length of the braided shield measured from the free end is removed for exposing an inner dielectric layer that surrounds a core conductor. The second length is less than the first length thereby leaving a portion of the exposed braided shield on the inner dielectric layer. The braided shield that is cut from the cable is twisted to form an elongate consolidated conductor. The consolidated conductor made of the braided shield is then soldered to the portion of the exposed braided shield that is left on the inner dielectric layer thereby completing the cable antenna. Preferably, the consolidated conductor made of the braided shield is arranged to be substantially normal to a central axis of the cable. If desired, the core conductor may be bent 90 degrees off the central axis of the cable. The consolidated conductor made of the braided shield may be replaced by other conductive member having substantially the same length.
REFERENCES:
patent: 4180819 (1979-12-01), Nakano
patent: 4358764 (1982-11-01), Cheal et al.
patent: 4400702 (1983-08-01), Tanaka
patent: 4599121 (1986-07-01), Edwards et al.
patent: 4641110 (1987-02-01), Smith
patent: 4660007 (1987-04-01), Edwards et al.
patent: 4748450 (1988-05-01), Hines et al.
Tang Chiu-Yu
Yang Johnny
Chung Wei Te
Hon Hai - Precision Ind. Co., Ltd.
Tran Chuc D
Wong Don
LandOfFree
Method for making antenna of coaxial cable and the antenna... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for making antenna of coaxial cable and the antenna..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for making antenna of coaxial cable and the antenna... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2500410