Communications: radio wave antennas – Antennas – With grounding structure
Reexamination Certificate
2000-09-07
2001-12-11
Ho, Tan (Department: 2821)
Communications: radio wave antennas
Antennas
With grounding structure
C343S7000MS, C343S702000
Reexamination Certificate
active
06329960
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to an antenna assembly suitable for a communication device such as a mobile transceiver, a mobile telephone, a device for providing radio communication to and from a personal computer, a wireless base station and so on. More particularly the invention relates to an antenna which is particularly adapted for insertion in a printed circuit board which carries at least some of the components for the communication device.
BACKGROUND OF THE INVENTION
A known form of antenna which may be employed in communication devices of the foregoing character is a planar suspended F antenna, which comprises a radiating element, typically a planar sheet, mounted above and extending partly over a ground plane, the radiating element being connected to the ground plane along one edge. A conductive antenna feed couples signals to or from the antenna and the operating circuits of the communication device the antenna feed is normally connected to the radiating element at a position substantially separated from the grounded edge thereof, typically at a location part of the way along the radiating element and at one edge thereof. The radiating element requires a continuous ground plane underneath it and according there should be no components of the aforesaid operating circuits located close to the radiating element.
It is desirable for the minimization of cost in product manufacturing to employ single sided printed circuit boards. Since a planar suspended F-type antenna requires significant space around it to be free from components, and having regard to the desirability of economising as far as possible in the occupancy of the area available on a printed circuit board, it is known to form the antenna with extending legs which are placed on the non-component side of the printed circuit board. Such a structure is difficult to place automatically and commonly it has to be placed and soldered in circuit by hand.
SUMMARY OF THE INVENTION
The invention particularly concerns an antenna assembly comprising a printed circuit board having on one face various components and on the other face a ground plane, said printed circuit board including an aperture and an antenna structure comprising a conductive ground plane element having peripheral parts overlapping the edge of the aperture, a connecting element extending from the ground plane member through the said aperture, a radiator element integral with the connecting element and extending generally parallel and within the area of the ground plane element, and an antenna feed element which extends from the radiating element though said aperture to said one face of the printed circuit board.
The antenna structure may be readily made from a single sheet of appropriate conductive material. It may be formed into the required shape by cutting and bending and may readily be inserted with the aid of an automatic insertion tool, through the aperture in the printed circuit board from the component side thereof until the peripheral parts engage the component bearing face of the printed circuit board. Automatic soldering is easy to perform on the component side of the printed circuit board both to secure the ground plane element in position and to provide the necessary conductive connection for the antenna feed.
A specific example of the invention will be described hereinafter with reference to the accompanying drawings.
REFERENCES:
patent: 5537123 (1996-07-01), Mandai et al.
patent: 6034636 (2000-03-01), Saitoh
patent: 6184834 (2001-02-01), Utsumi et al.
patent: 6195048 (2001-02-01), Chiba et al.
Andrew Rodger J
Williams Stephen A
3Com Corporation
Ho Tan
Nixon & Vanderhye P.C.
LandOfFree
Antenna assembly does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Antenna assembly, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Antenna assembly will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2589635