Combined mechanical package shield antenna

• US 20040145533A1
• Filed: 01/24/2003
• Published: 07/29/2004
• Est. Priority Date: 01/24/2003
• Status: Active Grant

• Current Assignee: Flextronics Corp. (Flex, Ltd.)
• Original Assignee: Solectron Corporation (Flex, Ltd.)
• Inventors: Taubman, Irving Louis
• Granted Patent: US 6,842,149 B2
• Time in Patent Office: Days
• US Class Current: 343/841
• CPC Class Codes: H01Q 1/526 Electromagnetic shields
• CPC Class Codes: H01Q 15/0013 said selective devices working as frequency-selective reflecting surfaces, e.g. FSS, dichroic plates, surfaces being partly transmissive and reflective
• CPC Class Codes: H01Q 23/00 Antennas with active circuits or circuit elements integrated within them or attached to them
• CPC Class Codes: H01Q 9/16 with feed intermediate between the extremities of the antenna, e.g. centre-fed dipole H01Q9/44 takes precedence

Abstract

The present invention relates to antennas for radio signal frequencies, an electromagnetic shield and a mechanical package for electronic components. The antenna uses a three-dimensional conductive structure to enclose the components that are used for the transmission and reception of wireless devices. This conductive structure preferably encloses electronic components. The structure can be divided into two or more sections such that each section is enclosed providing shielding from external electromagnetic fields. Each conductive section is connected to the antenna port or ports of the device it contains. The conductive mechanical package is preferably sized to resonant at the desired frequency of operation. If the electromagnetic fields to be radiated are within and outside the package, the internal bulkheads can be used to control the desired resonant modes. Photonic band gap structures can be also used to connect the pole elements.

Claims

1. An antenna for a wireless device, comprising:

a first pole element;

a second pole element;

a printed circuit board; and

an interconnect structure, which mechanically joins the first pole element to the second pole element, wherein the printed circuit board is enclosed in the first pole element, the second pole element, and/or the interconnect structure, which together define a mechanical package and an electromagnetic shield against any electromagnetic radiation.

2. The antenna of claim 1, wherein the first pole element and the second pole element and the interconnect structure are conductive to function as a dipole antenna.

3. The antenna of claim 1, further comprising a photonic band gap disposed between the first pole element and the second pole element, wherein the photonic band gap conducts so as to function as an electromagnetic shield when irradiated by electromagnetic radiation outside the frequencies selected for antenna propagation and as an insulator inside the frequencies selected for antenna propagation.

4. The antenna of claim 1, wherein the interconnect structure is spaced from the first pole element by an insulator and conductively connected to the second pole element.

5. The antenna of claim 1, wherein the first and second pole elements are a closed surface figure selected from the group of a cube, a rectangular prism, a square pyramid, a cylinder, a right circular cone, or a sphere.

6. The antenna of claim 1, wherein the length of the antenna is ≦

λ

/2, wherein λ

is the wavelength of the radiation propagated by the antenna.