Abstract: The invention relates to an integrated antenna for a portable computer. The portable computer has a main frame. The integrated antenna comprises a substrate, a first radiating metal strip, a second radiating metal strip, a ground plane, at least one first connecting metal strip and second connecting metal strip. The substrate has a connecting portion for connecting to the main frame. The first radiating metal strip is used to induce a first resonance, and the second radiating metal strip is used to induce a second resonance. The first connecting metal strip connects to the first radiating metal strip and the second radiating metal strip. The second connecting metal strip connects to the second radiating metal strip and the ground plane. The integrated antenna of the invention is mounted to the main frame of the portable computer. The length of a coaxial cable can be reduced. Therefore, the transmission loss and cost can be reduced.

Abstract: A broadband circularly polarized patch antenna is disclosed. The broadband circularly polarized patch antenna consists of: an L-shaped ground plane consisting of a vertical ground plane and a horizontal ground plane; a radiating metal patch; a probe feed placed coplanarly with the radiating metal patch and connected to the radiating metal patch through the vertical ground plane; and a substrate between the radiating metal patch and the horizontal ground plane. Because the probe feed of the broadband circularly polarized patch antenna of the present invention is placed coplanarly with the radiating metal patch, the required length of the probe feed is greatly reduced and the probe inductance effect on antenna's impedance matching is thus decreased, leading to enhanced circular polarization operating bandwidth. In addition, the broadband circularly polarized patch antenna of the present invention has the features of low cost, high antenna gain, good circular polarization radiation and simple structure.

Abstract: A dual-band FR4 chip antenna is disclosed. The present invention forms a meandering radiating metal line on a low-cost FR4 chip base, thereby achieving a dual-band operation. The present invention comprises: an FR4 chip base made of an FR4 material; a meandering radiating metal line; and a connecting point, wherein the meandering radiating metal line is formed on at least two surfaces of the FR4 chip base, and the connecting point is used for connecting the meandering radiating metal line to a signal transmission line. The present invention can cover two ISM (Industrial-Scientific-Medical) bands, such as those around 2450 MHz and 5800 MHz. The FR4 chip antenna in the present invention is not only easy to be integrated with microwave circuits, but also sturdy and cheap, and is further suitable for using the surface-mounting technology (SMT) to perform a mass production. In addition, the present invention has two separate wide bandwidths, and is suitable for dual-band operation.

Abstract: A broadband circularly polarized patch antenna is disclosed. The broadband circularly polarized patch antenna consists of: an L-shaped ground plane consisting of a vertical ground plane and a horizontal ground plane; a radiating metal patch; a probe feed placed coplanarly with the radiating metal patch and connected to the radiating metal patch through the vertical ground plane; and a substrate between the radiating metal patch and the horizontal ground plane. Because the probe feed of the broadband circularly polarized patch antenna of the present invention is placed coplanarly with the radiating metal patch, the required length of the probe feed is greatly reduced and the probe inductance effect on antenna's impedance matching is thus decreased, leading to enhanced circular polarization operating bandwidth. In addition, the broadband circularly polarized patch antenna of the present invention has the features of low cost, high antenna gain, good circular polarization radiation and simple structure.

Abstract: A dual-band inverted-F antenna is disclosed. This dual-band inverted-F antenna comprises: a substrate with a first surface and a second surface; a ground plane located on the second surface of the substrate; a first radiating metal line located on the first surface of the substrate; a second radiating metal line located on the first surface of the substrate; a feeding line located on the first surface of the substrate and the feeding line connected with the middle positions of the first radiating metal line and the second radiating metal line for feeding signal; a connecting line located on the first surface of the substrate and used to connect with the first radiating metal line and the second radiating metal line at the same time; and a common shorting metal pin used to short-circuit the first radiating metal line and the second radiating metal line to the ground plane.