ANTENNA ARRANGEMENTS FOR COVERING FREQUENCY BANDS
An exemplary embodiment of an antenna arrangement generally includes a board including a ground plane, a radiating element, and a first parasitic element. The radiating element is dimensioned for providing resonance at a first frequency. The radiating element is arranged at a first edge of the board. The first parasitic element is arranged at a second edge of the board opposite the first edge. The first parasitic element is dimensioned for providing resonance at another frequency near the first frequency for providing coverage of a first frequency band. A major extension of the first parasitic element is along the second edge of the board.
1 . An antenna arrangement comprising:
a board including a ground plane;
a radiating element dimensioned for providing resonance at a first frequency, the radiating element arranged at a first edge of the board; and
a first parasitic element arranged at a second edge of the board opposite the first edge, the first parasitic element dimensioned for providing resonance at another frequency near the first frequency for providing coverage of a first frequency band, wherein a major extension of the first parasitic element is along the second edge of the board.
2 . The antenna arrangement of claim 1 , wherein the first parasitic element is elongated with its direction of elongation provided along the second edge.
3 . The antenna arrangement of claim 1 , wherein the first parasitic element stretches along more than half of the second edge.
4 . The parasitic element of claim 3 , wherein the first parasitic element stretches along essentially the whole of the second edge.
5 . The antenna arrangement of claim 1 , wherein:
the radiating element is placed at a first distance above the board;
the first parasitic element is placed a second distance above the board; and
the second distance is equal to the first distance.
6 . The antenna arrangement of claim 1 , wherein:
the radiating element is placed at a first distance above the board;
the first parasitic element is placed a second distance above the board; and
the second distance is less than the first distance.
7 . The antenna device of claim 1 , wherein:
the radiating element is placed at a first distance above the board;
the first parasitic element is placed a second distance above the board; and
the second distance is higher than the first distance.
8 . The antenna arrangement of claim 1 , further comprising a tuning element connected to the radiating element.
9 . The antenna arrangement of claim 8 , wherein the tuning element is placed in a series connection between the radiating element and a radio circuit.
10 . The antenna arrangement of claim 9 , wherein the tuning element is provided in a conductor leading from a feeding connection of the radiating element to the radiating element.
11 . The antenna arrangement of claim 8 , wherein the tuning element is a capacitor.
12 . The antenna arrangement of claim 1 , wherein:
the first frequency is a first low frequency;
the second frequency is a second low frequency;
the frequency band covered by the first and second low frequencies is a low-frequency band; and
the radiating element is further dimensioned for providing resonance at a first high frequency in order to cover a high-frequency band separate from the low-frequency band.
13 . The antenna arrangement of claim 12 , further comprising a second parasitic element adjacent the radiating element and dimensioned for providing resonance at a second high frequency in order to assist in covering the high-frequency band.
14 . The antenna arrangement of claim 13 , wherein the high-frequency band covers the frequency range between 1710 and 2170 MHz.
15 . The antenna arrangement of claim 1 , wherein the radiating element generally extends along the first edge of the board.
16 . The antenna arrangement of claim 1 , wherein the first frequency band covers the frequency range between 824 MHz and 960 MHz.
17 . The antenna arrangement of claim 1 , wherein the first parasitic element has an inductance and a capacitance forming a resonance circuit defining the second frequency.
18 . A portable radio communication device comprising the antenna arrangement of claim 1 .
19 . A portable radio communication device comprising:
a board including a ground plane;
a radiating element dimensioned for providing resonance at a first frequency, the radiating element arranged at a first edge of the board; and
a first parasitic element arranged at a second edge of the board opposite the first edge, the first parasitic element dimensioned for providing resonance at another frequency near the first frequency for providing coverage of a first frequency band, wherein a major extension of the first parasitic element is along the second edge of the board.
20 . The portable radio communication device of claim 19 , wherein:
the radiating element is further dimensioned for providing resonance at a first high frequency in order to cover a high-frequency band separate from the low-frequency band;
a second parasitic element is adjacent the radiating element and dimensioned for providing resonance at a second high frequency in order to assist in covering the high-frequency band;
the high-frequency band covers the frequency range between 1710 and 2170 MHz; and
the first frequency band covers the frequency range between 824 MHz and 960 MHz.