Portable communication device with ultra wideband antenna
A communication device is provided, which includes a circuit board having first and second sides that are substantially straight in the area in which the first and second sides meet to form a corner at an angle of less than 180°; a ground plane extending between the first and the second sides, except in a particular area of the corner of the circuit board; a radiating antenna element disposed in the particular area; and an electrical connection to feed the radiating antenna element across an interface between the ground plane and the particular area.
1. A communication device comprising:
a circuit board including a first side and a second side that are substantially straight in at least a first area in which the first and second sides meet to form a corner at an angle of less than 180°;
a ground plane extending between the first and the second sides except in a second area of the corner of the circuit board;
a radiating antenna element provided in the second area, where the first and second side of the second area have lengths greater than ¼ of a wavelength of a lowest frequency of a band of operable frequencies associated with the radiating antenna element; and
an electrical connection to feed the radiating antenna element across an interface between the ground plane and the second area.
2. The communication device of claim 1 , where the electrical connection is provided across a midline of the interface.
3. The communication device of claim 2 , where the electrical connection is provided at right angles to the interface.
4. The communication device of claim 1 , where the ground plane comprises a section formed as a triangle with a truncated top that faces the second area.
5. The communication device of claim 1 , where the ground plane covers an entirety of the board except for the second area.
6. The communication device of claim 1 , further comprising:
a radio communication circuit on the circuit board, where the radiating antenna element connects to the radio communication circuit via the electrical connection, and the electrical connection is isolated from the ground plane.
7. The communication device of claim 1 , where the radiating antenna element is of a meandering shape.
8. The communication device of claim 1 , where the radiating antenna element is of a helical shape.
9. The communication device of claim 1 , where the radiating antenna element is of a three-dimensional structure.
10. The communication device of claim 9 , where the radiating antenna element is provided in a component made from at least one of ceramic or dielectric material.
11. The communication device of claim 1 , where the radiating antenna element is of a two-dimensional shape.
12. The communication device of claim 11 , where the radiating antenna element is printed on the circuit board.
13. The communication device of claim 1 , where the radiating antenna element comprises a monopole antenna element.
14. The communication device of claim 1 , where the communication device is a mobile phone.
15. An antenna arrangement comprising:
a ground plane including a first side and a second side and forming a triangular-shaped section having a truncated top facing a free area shaped as a triangle;
a radiating antenna element provided in the free area, where the free area together with the triangular-shaped section of the ground plane forms a complete triangle; and
an electrical connection to feed the radiating antenna element across an interface between the ground plane and the free area, where the first and second side of the free area have lengths greater than ¼ of a wavelength of a lowest frequency of a band of operable frequencies associated with the radiating antenna element.
16. The antenna arrangement of claim 15 , where the electrical connection is provided across a midline of the interface.
17. The antenna arrangement of claim 16 , where the electrical connection is provided at right angles to the interface.