Built-in dual frequency antenna

• US 6,337,663 B1
• Filed: 01/02/2001
• Issued: 01/08/2002
• Est. Priority Date: 01/02/2001
• Status: Expired due to Term

• Current Assignee: Auden Techno Corp.
• Original Assignee: Auden Techno Corp.
• Inventors: Chi-Ming, Chiang
• Primary Examiner(s): Wong, Don
• Assistant Examiner(s): Clinger, James
• Application Number:
  US09/750,680
• Time in Patent Office: 371 Days
• Field of Search: 343/702, 343/700.MS, 343/895, 455/90
• US Class Current: 343/702
• CPC Class Codes: H01Q 1/243 with built-in antennas
• 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 1/38 formed by a conductive layer on an insulating support patch antennas H01Q9/0407; microstrip dipole antennas H01Q9/065; microstrip slot antennas H01Q13/106; transmission line microstrip antennas H01Q13/206; manufacturing reflecting surfaces using insulating material for supporting the reflecting surface H01Q15/142
• CPC Class Codes: H01Q 5/357 using a single feed point
• CPC Class Codes: H05K 3/325 by abutting or pinching, i.e. without alloying process; mechanical auxiliary parts therefor adaptations of leads inserted in holes for press-fit connections H05K3/308
• CPC Class Codes: H05K 3/366 substantially perpendicularly to each other H05K3/361 takes precedence

Abstract

An upright style built-in dual frequency antenna comprising an electric circuit board of a microstrip antenna, wherein, a microstrip of a small width in the form of continuous waves connected on the two ends thereof to two horizontal microstrips of larger widths together forming the microstrip antenna is printed on one side of the electric circuit board, the electric circuit board of microstrip antenna is installed upright in the top portion of communication equipment, an elastic metallic connecting member is connected with an antenna circuit of a main board of a communication device and with one of the horizontal microstrips of a larger width; a printing surface of the electric circuit board of the microstrip antenna faces to the top of the communication device without impediment of any metallic member. Thereby, it can get an ideal signal emitting and receiving performance with such a hidden structure.

Claims

1. A communication device having a dual frequency antenna and comprising:

a communication device housing bounding a cavity and having a panel surface including a keying area, the housing having an insertion groove extending into the cavity;

a main board located within the cavity and having a circuit thereon including a connecting end;

a planar electric circuit board mounted in the cavity in the insertion groove;

a flat microstrip antenna, for receiving and transmitting a high or low frequency harmonic oscillation points by coupling and by means of its electrical gross length, and comprising a metallic microstrip in the form of a continuous wave having a first and second opposite ends, and two linear metallic microstrips, one end of each of the two linear microstrips in contact with one of the opposite ends of the continuous wave microstrip, the continuous wave microstrip and the linear microstrips being disposed on a surface of the electric circuit board, the continuous wave microstrip having a first width, and the two linear metallic microstrips each having a second width, wherein said second width is greater than the first width; and

,

a metallic connecting member connecting one of the two linear metallic microstrips to the connecting end.

2. The dual frequency antenna as claimed in claim 1 wherein:

said microstrip antenna is disposed on the surface of the electric circuit by screen-printing.

3. The dual frequency antenna as claimed in claim 1 wherein:

one of the two linear metallic microstrips has first and second ends, said first end having an opening whereby the connecting member extends through the opening.

4. The dual frequency antenna as claimed in claim 1 wherein:

the metallic connecting member is elastic.