Metal body antenna having loop type radiation elements
A metal body antenna using a housing unit and a battery cover as an antenna. The metal body antenna includes a radiation element supplied with a signal from a feeding power port, a ground coupled to the radiation element by loop coupling to generate an induction current, a frame bezel unit separated from the ground by a dielectric and a gap, and a connection line configured to connect the ground and the frame bezel unit and formed over the dielectric so that an electric current induced into the ground flows into the frame bezel unit, wherein an antenna having an electrical length of a half wavelength operates in a wideband. Accordingly, a bezel unit is effectively used, and a wideband and multi-band antenna structure having a radiation loss satisfies all of the Penta Band (i.e., GSM850, EGSM, DCS, PCS, and W2100), that is, bands chiefly used in mobile phones.
1. A metal body antenna having loop type radiation elements in a housing unit, the metal body antenna comprising:
a first antenna unit having an electrical length of a half wavelength and comprising:
a first radiation element supplied with a signal of a low frequency band from a first feeding power port formed in the housing unit,
a ground formed in the housing unit and coupled to the first radiation element by loop coupling to generate an induction current,
a connection line connected to the ground, and
a frame bezel unit connected to the connection line and opened by a gap; and
a second antenna unit having an electrical length of a half wavelength and comprising:
a second radiation element supplied with a signal of a high frequency band from a second feeding power port formed in the housing unit,
a ground formed in the housing unit and coupled to the second radiation element by loop coupling to generate an induction current,
a connection line connected to the ground, and
a frame bezel unit connected to the connection line and opened by a gap.
2. The metal body antenna of claim 1 , wherein:
the frame bezel unit is separated from the ground by a dielectric and a gap; and
the connection line is configured on the dielectric to connect the ground and the frame bezel unit so that the induction current flows into the frame bezel unit.
3. The metal body antenna of claim 1 , wherein the frame bezel unit surrounds an outermost edge part of the ground.
4. The metal body antenna of claim 1 , wherein the frame bezel unit is formed on an outskirt of the housing unit.
5. The metal body antenna of claim 1 , wherein the first radiation element and the second radiation element are formed on both sides of the ground based on the connection line.
6. The metal body antenna of claim 2 , wherein the first radiation element and the second radiation element are formed on both sides of the ground based on the connection line.
7. The metal body antenna of claim 3 , wherein the first radiation element and the second radiation element are formed on both sides of the ground based on the connection line.
8. The metal body antenna of claim 4 , wherein the first radiation element and the second radiation element are formed on both sides of the ground based on the connection line.
9. The metal body antenna of claim 1 , wherein L-C elements are inserted between the first feeding power port and the first radiation element, and between the second feeding power port and the second radiation element, respectively.
10. The metal body antenna of claim 2 , wherein L-C elements are inserted between the first feeding power port and the first radiation element, and between the second feeding power port and the second radiation element, respectively.
11. The metal body antenna of claim 3 , wherein L-C elements are inserted between the first feeding power port and the first radiation element, and between the second feeding power port and the second radiation element, respectively.
12. The metal body antenna of claim 4 , wherein L-C elements are inserted between the first feeding power port and the first radiation element, and between the second feeding power port and the second radiation element, respectively.
13. The metal body antenna of claim 1 , wherein the first radiation element and the second radiation element are each disposed at a specific location above the ground between the gap and the connection line.
14. The metal body antenna of claim 2 , wherein the first radiation element and the second radiation element are each disposed at a specific location above the ground between the gap and the connection line.
15. The metal body antenna of claim 3 , wherein the first radiation element and the second radiation element are each disposed at a specific location above the ground between the gap and the connection line.
16. The metal body antenna of claim 4 , wherein the first radiation element and the second radiation element are each disposed at a specific location above the ground between the gap and the connection line.