Mobile antenna unit and accompanying communication apparatus

1. An antenna unit, comprising:

a ground part grounded to the earth;

a feed antenna element, a first edge of which is connected to said ground part, provided with a feeding point between said first edge and a second edge of said antenna element;

a non-feed antenna element, which is resonated by said feed antenna element through electrical coupling; and

a resonance element, one edge of which is connected to said ground part, which is resonated by said non-feed antenna element through electrical coupling,

wherein said non-feed antenna element comprises two or more non-feed antenna elements, the lengths of which are different along a direction of resonance with said feed antenna element and said resonance element.

2. The antenna unit according to claim 1 , wherein said feed antenna element, said non-feed antenna element and the resonance element oscillate in the shape of a loop, and said loop-shaped route has a length of a standing wave of one period generated by said oscillation.

3. The antenna unit according to claim 1 , wherein each of said two or more non-feed antenna elements has a feed antenna element side electrical coupling part, which faces said feed antenna element and which resonates through electrical coupling, and a resonance element side electrical coupling part, which faces said resonance element and allows said resonance element to be resonated by electrical coupling.

4. The antenna unit according to claim 1 , wherein said resonance element extends in a direction that maintains a distance between said feed antenna element and said edge of said resonance element that is connected to said ground part.

5. The antenna unit according to claim 1 , wherein the feed antenna element comprises an inverted F-type antenna element.

6. An antenna unit, comprising:

a ground part grounded to the earth;

a feed antenna element, a first edge of which is connected to said ground part, provided with a feeding point between said first edge and a second edge of said antenna element;

a non-feed antenna element, which is resonated by said feed antenna element through electrical coupling; and

a resonance element, one edge of which is connected to said ground part, which is resonated by said non-feed antenna element through electrical coupling,

wherein when a first frequency signal is supplied to said feeding point, said feed antenna element oscillates and said non-feed antenna element resonates, so that said antenna unit radiates an electric wave corresponding to said first frequency signal as a waveguide device, and when a second frequency signal lower than said first frequency is supplied to said feeding point, said feed antenna element, said non-feed antenna element and the resonance element oscillate in the shape of a loop, so that said antenna unit radiates an electric wave corresponding to said second frequency signal.

7. The antenna unit according to claim 6 , wherein the feed antenna element comprises an inverted F-type antenna element.

8. A communication apparatus, comprising:

a transmission circuit which generates signals to be radio-transmitted;

a ground part grounded to the earth;

a feed antenna element, a first edge of which is connected to said ground part, provided with a feeding point located between said first edge and a second edge of said feed antenna element, and which feeding point is supplied with signals generated by said transmission circuit;

a non-feed antenna element configured to resonate with said feed antenna element through electrical coupling;

a resonance element, one edge of which is connected to said ground part, configured to resonate with said non-feed antenna element through electrical coupling;

an input part for accepting user input in order to direct the operations of said communication apparatus;

a display part for outputting information to a user of said communication apparatus; and

a hinge part for connecting said display part to said input part and allowing said display part to move between a closed position against said input part and an open position away from said input part, and

wherein said feed antenna element and said non-feed antenna element are provided on a side of said display part and are generally parallel with said side.

9. The communication apparatus according to claim 8 , wherein said non-feed antenna element comprises two or more non-feed antenna elements, the lengths of which are different along a direction of resonance with said feed antenna element and said resonance element.

10. The communication apparatus according to claim 9 , wherein each of said two or more non-feed antenna elements has a feed antenna element side electrical coupling part, which faces said feed antenna element and which resonates through electrical coupling, and a resonance element side electrical coupling part, which faces said resonance element and allows said resonance element to be resonated by electrical coupling.

11. The communication apparatus according to claim 8 , wherein when a first frequency signal is supplied to said feeding point, said feed antenna element oscillates and said non-feed antenna element resonates, so that said antenna unit radiates an electric wave corresponding to said first frequency signal as a waveguide device, and when a second frequency signal lower than said first frequency is supplied to said feeding point, said feed antenna element, said non-feed antenna element and the resonance element oscillate in the shape of a loop, so that said antenna unit radiates an electric wave corresponding to said second frequency signal.

12. The communication apparatus according to claim 8 , wherein the feed antenna element comprises an inverted F-type antenna element.