Abstract: A dual-mode antenna device (20) includes a wireless module (207) and a second wireless module (208) transceiving signals of a first wireless network signal and a second wireless network. A first antenna (201) and a second antenna (202) transceive the signals, respectively. A first switch (203) is connected to the first antenna and a second switch (204) is connected to the second antenna. A third switch (205) is connected to the first switch, the second switch and the first wireless network module. A fourth switch (206) is connected to the first switch, the third switch and the second wireless network module. The first, third, and fourth switches collaboratively select the first antenna to transmit the wireless network signals. The second, third, and fourth switches collaboratively select the second antenna to transmit the wireless network signals.

Abstract: A multiple input multiple output (MIMO) tester tests various communication parameters of a MIMO device. The MIMO tester includes a first attenuation circuit, a switch circuit, a controlling circuit, and a divider circuit. The first attenuation circuit adjusts an equivalent resistance of the MIMO tester, wherein the first attenuation circuit is electronically connected to the MIMO device. The switch circuit comprises a plurality of switch elements, wherein each switch element comprises an input end, a first output end and a second output end, wherein the switch circuit is electronically connected to the first attenuation circuit. The controlling circuit controls operation of the switch circuit, wherein the controlling circuit is electronically connected to the switch circuit. The divider circuit electronically connected to the switch circuit receives electronic signals from the MIMO device, divides each electronic signal into a plurality of sub-signals, and sends the sub-signals to at least one test device.

Abstract: A comb-line wireless filter (5) includes an input end (505a), an output end (505b), a first transmission line (501b), a second and third transmission line (501a, 501c) each having a curved shape, and a first, second, and third capacitor (503b, 503a, 503c). The first transmission line has a first transmission line part and a second transmission line part. The second transmission line and the third transmission line are separately on the two sides of the first transmission line part of the first transmission line. The input end and the output end are separately connected to first ends of the second transmission line and the third transmission line. The capacitors are separately connected to first ends of the transmission lines. According to the curved shape of the second transmission line and the third transmission line, the size of the comb-line wireless filter is significantly reduced.

Abstract: A planar antenna (20) includes a radiating body (21), a feeding portion (22), and a first metallic ground plane (24). The radiating body includes a first radiating portion (212) extending away from the feeding portion and a second radiating portion (214) extending away from the feeding portion next to the first radiating portion. The first radiating portion includes an open end (2122) disposed at an extending end of the first radiating portion to point toward the second radiating portion, and a connecting portion (2124). The second radiating portion includes a free end (2144) disposed at an extending end of the second radiating portion to point toward the first radiating portion, and an end (2146) connected to the connecting portion. A first gap (26) is formed between the open end and the free end. The open end, the first gap and the free end are aligned with one another.

Abstract: A planar antenna (20) disposed on a substrate (10) including a first surface (102) and a second surface (104). The planar antenna includes a radiating body (21) laid on the first surface for transmitting and receiving radio frequency (RF) signals, a feeding portion (22), and a first metallic ground plane (24) laid on the second surface. The radiating body includes a first radiating portion (212) and a second radiating portion (214). The first radiating portion includes an open end (2122), and a connecting portion (2124). The second radiating portion includes a free end (2144) and an end (2146) connected to the connecting portion. A first gap (26) is formed between the open end and the free end. The feeding portion is laid on the first surface and electrically connected to the connecting portion. The first ground plane is electrically connected to the second radiating portion through a via (23).

Abstract: Disclosed is a signal transceiving device (30) capable of being easily mounted on a substrate (10) and providing effective transceiving performance. At least one RF module (106) is disposed on the substrate. The signal transceiving device includes at least one antenna (32) for transmitting and receiving electromagnetic wave signals, a shielding apparatus (34) and a connecting member (36). The shielding apparatus includes a shield (346) for shielding electromagnetic interference signals generated by the at least one RF module, and a base (340) for supporting the shield. The connecting member (36) is connected to the at least one antenna and the base.

Abstract: A dual-band antenna includes a ground point, a feeding element, a first radiation element, a second radiation element, and an impedance element. The ground point is electronically connected to the first radiation element and the second radiation element. The first radiation element is electronically connected to the feeding element via a first feeding point, and the second radiation element is electronically connected to the feeding element via a second feeding point. The first radiation element includes a head and a neck. A width of the neck decreases from the head toward the first feeding point. The impedance element extends from the neck and through the first feeding point. The dual-band antenna further includes a support element that is connected to the ground point.

Abstract: A comb-line wireless filter (5) includes an input end (505a), an output end (505b), a first transmission line (501b), a second and third transmission line (501a, 501c) each having a curved shape, and a first, second, and third capacitor (503b, 503a, 503c). The first transmission line has a first transmission line part and a second transmission line part. The second transmission line and the third transmission line are separately on the two sides of the first transmission line part of the first transmission line. The input end and the output end are separately connected to first ends of the second transmission line and the third transmission line. The capacitors are separately connected to first ends of the transmission lines. According to the curved shape of the second transmission line and the third transmission line, the size of the comb-line wireless filter is significantly reduced.

Abstract: A dual-band antenna includes a ground point, a feeding element, a first radiation element, a second radiation element, and an impedance element. The ground point is electronically connected to the first radiation element and the second radiation element. The first radiation element is electronically connected to the feeding element via a first feeding point, and the second radiation element is electronically connected to the feeding element via a second feeding point. The first radiation element includes a head and a neck. A width of the neck decreases from the head toward the first feeding point. The impedance element extends from the neck and through the first feeding point. The dual-band antenna further includes a support element that is connected to the ground point.