Abstract: A dual-band antenna (10) is disposed on a substrate (20), for transceiving electromagnetic signals of different frequencies. The dual-band antenna includes a grounded portion (12), a feeding portion (14), and a radiation body (16). The feeding portion is adjacent to the grounded portion. The radiation body electronically connected to the feeding portion, includes a first radiation portion (160) and a second radiation portion (162). The first radiation portion includes a first free end (160c), a first connecting end (160a) electronically connected to the feeding portion, and a serpentine portion (160b) between the first free end and the first connecting end. The second radiation portion, includes a second connecting end (162a) electronically connected to the first connecting end, and a second free end (162b), wherein the first free end and the second free end face each other and a gap (18) is formed therebetween.

Abstract: A printed antenna (10) disposed on a substrate (90) includes a feeding portion (12), a first radiation portion (16), a second radiation portion (18), a matching portion (14), and a grounded portion. The feeding portion feeds electromagnetic signals. One end of the first radiation portion is electronically connected to the feeding portion, and the other end of the first radiation portion is a free end. One end of the second radiation portion is electronically connected to the feeding portion and the first radiation portion, and the other end of the second radiation portion is a free end. The second radiation portion includes a plurality of radiation segments forming at least one space, and the first radiation portion is accommodated in the space formed by the radiation segments. The matching portion is electronically connected to the feeding portion, for impedance matching. The grounded portion is located adjacent to the feeding portion.

Abstract: A printed antenna (10) disposed on a substrate (90) includes a feeding portion (12), an antenna body (16), a first grounded portion (20), a second grounded portion (30), and a matching portion (14). The feeding portion feeds electromagnetic signals. The antenna body electronically connected to the feeding portion transmits and receives electromagnetic signals, and includes a first radiation portion (162), a pair of second radiation portions (164), and a pair of third radiation portions (166). The first radiation portion, the second radiation portions, and the third radiation portions co-form, a “D” shape with an indentation in a straight side of the “D” shape which extends into a middle of the “D” shape. The first grounded portion and the second grounded portion are respectively disposed on opposite sides of the feeding portion. The matching portion is disposed on one side of the feeding portion, and located adjacent to the first grounded portion.

Abstract: An antenna disposed on a circuit board includes a first surface, a second surface, a feeding part, a body portion, a first accessory portion, a second accessory portion, and a ground plane. The feeding part includes a first feeding segment disposed on the first surface and a second feeding segment disposed on the second surface. The body portion includes a first radiation part, a second radiation part, a third radiation part, and a fourth radiation part. The first accessory portion, the second accessory portion, the first radiation part, and the second radiation part are all disposed on the first surface. The third radiation part and the fourth radiation part are disposed on the second surface. The ground plane includes a pair of first ground parts disposed on the first surface and a second ground part disposed on the second surface.

Abstract: A dual-band antenna for radiating electromagnetic signals of different frequencies includes a ground portion (500), a feeding part (400), and a body (100). The feeding part (400) is for feeding signals. The body (100) includes a first radiating part (110) and a second radiating part (120). The first radiating part includes a bent portion (115), a first free end (111), and a first connecting end (112). The bent portion (115) is between the first free end (111) and the first connecting end (112). The first connecting end (111) is electronically connected to the feeding part (400). The second radiating part (120) includes a second connecting end (122) and a second free end (121). The second connecting end (122) is connected to the first connecting end (112). The shorting part (200) is between the body (100) and the ground portion (500).

Abstract: An ultra wideband (UWB) filter (20) disposed on a substrate (10). The UWB filter includes a first transmission portion (22), a second transmission portion (24), a connection portion (26), and a grounded portion (28). The first transmission portion is used for transmitting electromagnetic signals. The second transmission portion is used for transmitting the electromagnetic signals. The connection portion directly and electronically connects the first transmission portion to the second transmission portion. The grounded portion is electronically connected to the first transmission portion.

Abstract: A planar antenna disposed on a substrate (100) includes a metallic ground plane (200), a radiating part (300), an open-short transforming part (400), a joint portion (700), and a feeding part (500). The metallic ground plane is laid on the substrate. The radiating part transmits and receives radio frequency (RF) signals, and includes a first bent portion (320) and an open end (310). The first bent portion is electrically connected to the open end. The open-short transforming part is electrically connected between the radiating part and the metallic ground plane, and includes a second bent portion (430). The joint portion connects the open-short transforming part and the radiating part, and defines a recessed portion (701). The feeding part is electrically connected to the joint portion, for feeding signals.

Abstract: A band pass filter (10) mounted on a base plate (20) includes a loop-step resonator (12), an input portion (100), and an output portion (150). The input portion is electronically connected to the loop-step resonator for inputting electromagnetic signals thereto. The output portion is electronically connected to the loop-step resonator for outputting electromagnetic signals therefrom.

Abstract: A filter includes an input portion, a low-impedance transmission portion, a high-impedance transmission portion, and an output portion. The input portion receives electromagnetic signals. The high-impedance transmission portion is electrically connected to the input portion, and includes a first high-impedance transmission portion, a second high-impedance transmission portion, a third high-impedance transmission portion, a first connection portion, and a second connection portion. The low-impedance transmission portion is electrically connected to the second high-impedance transmission portion, and includes a pair of protrusion portions. The output portion is electrically connected to the third high-impedance transmission portion, for outputting the electromagnetic signals therefrom. The first connection portion electrically connects the first high-impedance transmission portion to the second high-impedance transmission portion.

Abstract: A low-pass filter (20) is disposed on a substrate (10). The low-pass filter includes an input portion (202), an output portion (208), a first transmission portion (204), a second transmission portion (206), a capacitance component (210), and an inductance component (212). The input portion is used for inputting electromagnetic signals. The output portion is used for outputting electromagnetic signals. The first transmission portion includes a first connection section (2040) electronically connected to the input portion and a first open end (2042). The second transmission portion includes a second connection section (2060) electronically connected to the output portion and a second open end (2062). The capacitance component is electronically connected to the first connection section and the second connection section. The inductance component is electronically connected to the first open end and the second open end.

Abstract: A dual-band antenna for radiating electromagnetic signals of different frequencies includes a ground portion (500), a feeding part (400), a body (100) and a shorting part (200). The feeding part (400) is for feeding signals. The body (100) includes a first radiating part (110) and a second radiating part (120). The first radiating part includes a bent portion (115), a first free end (111), and a first connecting end (112). The bent portion (115) is between the first free end (111) and the first connecting end (112). The first connecting end (111) is electronically connected to the feeding part (400). The second radiating part (120) includes a second connecting end (122) and a second free end (121). The second connecting end (122) is connected to the first connecting end (112). The shorting part (200) is between the body (100) and the ground portion (500).

Abstract: A planar inverted-F antenna includes a body (300), a feed wire (400), a shorting strip (500), and a metallic ground plane (200). The body is used for radiating and receiving radio frequency signals, and includes a radiating end (310) and a shorting end (320). The shorting end is electrically connected to a metallic ground plane by the shorting strip. The feed wire is electrically connected to the body. The body includes bent portions (330, 340) disposed between the shorting end and the radiating end. Due to the bent portions, the planar inverted-F antenna has a compact profile and a smaller size. In addition, the bent portions generate an inductance effect that can regulate the input impedance of the planar inverted-F antenna.

Abstract: An antenna (10) is provided. The antenna (10) with coupling feeding, printed on a substrate (30) for transceiving electromagnetic signals. The antenna includes a radiator (12), a feeding portion (14), and a grounded portion (16). The radiator is for the transceiving electromagnetic signals. The feeding portion defines a gap with the radiator for coupling feeding the electromagnetic signals to the radiator via the gap. The grounded portion is disposed adjacent to the feeding portion.

Abstract: A printed antenna (10) disposed on a substrate (90) includes a feeding portion (12), a first radiation portion (16), a second radiation portion (18), a matching portion (14), and a grounded portion. The feeding portion feeds electromagnetic signals. One end of the first radiation portion is electronically connected to the feeding portion, and the other end of the first radiation portion is a free end. One end of the second radiation portion is electronically connected to the feeding portion and the first radiation portion, and the other end of the second radiation portion is a free end. The second radiation portion includes a plurality of radiation segments forming at least one space, and the first radiation portion is accommodated in the space formed by the radiation segments. The matching portion is electronically connected to the feeding portion, for impedance matching. The grounded portion is located adjacent to the feeding portion.

Abstract: A printed antenna (10) disposed on a substrate (90) includes a feeding portion (12), an antenna body (16), a first grounded portion (20), a second grounded portion (30), and a matching portion (14). The feeding portion feeds electromagnetic signals. The antenna body electronically connected to the feeding portion transmits and receives electromagnetic signals, and includes a first radiation portion (162), a pair of second radiation portions (164), and a pair of third radiation portions (166). The first radiation portion, the second radiation portions, and the third radiation portions co-form, a “D” shape with an indentation in a straight side of the “D” shape which extends into a middle of the “D” shape. The first grounded portion and the second grounded portion are respectively disposed on opposite sides of the feeding portion. The matching portion is disposed on one side of the feeding portion, and located adjacent to the first grounded portion.

Abstract: A dual-band antenna (10) is disposed on a substrate (20), for transceiving electromagnetic signals of different frequencies. The dual-band antenna includes a grounded portion (12), a feeding portion (14), and a radiation body (16). The feeding portion is adjacent to the grounded portion. The radiation body electronically connected to the feeding portion, includes a first radiation portion (160) and a second radiation portion (162). The first radiation portion includes a first free end (160c), a first connecting end (160a) electronically connected to the feeding portion, and a serpentine portion (160b) between the first free end and the first connecting end. The second radiation portion, includes a second connecting end (162a) electronically connected to the first connecting end, and a second free end (162b), wherein the first free end and the second free end face each other and a gap (18) is formed therebetween.

Abstract: An antenna (10) is provided. The antenna (10) with coupling feeding, printed on a substrate (30) for transceiving electromagnetic signals. The antenna includes a radiator (12), a feeding portion (14), and a grounded portion (16). The radiator is for the transceiving electromagnetic signals. The feeding portion defines a gap with the radiator for coupling feeding the electromagnetic signals to the radiator via the gap. The grounded portion is disposed adjacent to the feeding portion.

Abstract: An antenna disposed on a circuit board includes a first surface, a second surface, a feeding part, a body portion, a first accessory portion, a second accessory portion, and a ground plane. The feeding part includes a first feeding segment disposed on the first surface and a second feeding segment disposed on the second surface. The body portion includes a first radiation part, a second radiation part, a third radiation part, and a fourth radiation part. The first accessory portion, the second accessory portion, the first radiation part, and the second radiation part are all disposed on the first surface. The third radiation part and the fourth radiation part are disposed on the second surface. The ground plane includes a pair of first ground parts disposed on the first surface and a second ground part disposed on the second surface.

Abstract: A band pass filter (10) mounted on a base plate (20) includes a loop-step resonator (12), an input portion (100), and an output portion (150). The input portion is electronically connected to the loop-step resonator for inputting electromagnetic signals thereto. The output portion is electronically connected to the loop-step resonator for outputting electromagnetic signals therefrom.

Abstract: A filter includes an input portion, a low-impedance transmission portion, a high-impedance transmission portion, and an output portion. The input portion receives electromagnetic signals. The high-impedance transmission portion is electrically connected to the input portion, and includes a first high-impedance transmission portion, a second high-impedance transmission portion, a third high-impedance transmission portion, a first connection portion, and a second connection portion. The low-impedance transmission portion is electrically connected to the second high-impedance transmission portion, and includes a pair of protrusion portions. The output portion is electrically connected to the third high-impedance transmission portion, for outputting the electromagnetic signals therefrom. The first connection portion electrically connects the first high-impedance transmission portion to the second high-impedance transmission portion.