PLANAR ANTENNA AND WIRELESS COMMUNICATION APPARATUS
First Claim
1. A planar antenna, disposed on a plate having a first surface and a second surface, the planar antenna comprising:
- a metal layer, disposed on the first surface, and having a slot line for exposing the first surface;
an antenna body, disposed on the second surface, and having a ground end and a feed end, wherein the antenna body is corresponding to a surrounding of the metal layer except a partial area of the feed end thereof;
a coupling device, disposed on the second surface, and a partial area of the coupling device corresponding to the slot line of the metal layer;
a matching device, disposed on the second surface in an approach of corresponding to the metal layer, and electrically connected to the coupling device and the feed end, wherein the matching device is used for impedance matching between the antenna body and the coupling device; and
a stepped impedance device, disposed on the second surface in the approach of corresponding to the metal layer, and electrically connected to the ground end of the antenna body, wherein the stepped impedance device has a transmission zero when being operated in a radio frequency band.
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Accused Products
Abstract
A planar antenna disposed on a plate having a first surface and a second surface is provided. The planar antenna includes a metal layer, an antenna body, a stepped impedance device, a coupling device and a matching device. The metal layer is disposed on the first surface and has a slot line exposing the first surface. The antenna body, the stepped impedance device, the coupling device and the matching device are disposed on the second surface. The antenna body is corresponding to a surrounding of the metal layer except a feed end thereof, the stepped impedance device and the matching device are corresponding to the metal layer, and the coupling device is corresponding to the slot line. The matching device is coupled between the coupling device and the feed end. The stepped impedance device has a transmission zero in a radio frequency band operated by the antenna body.
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Citations
20 Claims
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1. A planar antenna, disposed on a plate having a first surface and a second surface, the planar antenna comprising:
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a metal layer, disposed on the first surface, and having a slot line for exposing the first surface; an antenna body, disposed on the second surface, and having a ground end and a feed end, wherein the antenna body is corresponding to a surrounding of the metal layer except a partial area of the feed end thereof; a coupling device, disposed on the second surface, and a partial area of the coupling device corresponding to the slot line of the metal layer; a matching device, disposed on the second surface in an approach of corresponding to the metal layer, and electrically connected to the coupling device and the feed end, wherein the matching device is used for impedance matching between the antenna body and the coupling device; and a stepped impedance device, disposed on the second surface in the approach of corresponding to the metal layer, and electrically connected to the ground end of the antenna body, wherein the stepped impedance device has a transmission zero when being operated in a radio frequency band. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A wireless communication apparatus, comprising:
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a first plate, having a first surface and a second surface; a second plate, the first plate and the second plate forming a chamber to contain an inner circuit of the wireless communication apparatus; and a plurality of planar antennas, disposed on the first plate, and each of the planar antennas comprising; a metal layer, disposed on the first surface, and having a slot line for exposing the first surface; an antenna body, disposed on the second surface, and having a ground end and a feed end, wherein the antenna body is corresponding to a surrounding of the metal layer except a partial area of the feed end thereof; a coupling device, disposed on the second surface, and a partial area of the coupling device corresponding to the slot line of the metal layer; a matching device, disposed on the second surface in an approach of corresponding to the metal layer, and electrically connected to the coupling device and the feed end of the antenna body, wherein the matching device is used for impedance matching between the antenna body and the coupling device; and a stepped impedance device, disposed on the second surface in the approach of corresponding to the metal layer, and electrically connected to the ground end of the antenna body, wherein the stepped impedance device has a transmission zero when being operated in a radio frequency band. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification