Abstract: A leaky-wave antenna capable of multi-plane scanning is provided. The leaky-wave antenna includes a substrate, a first antenna series, a second antenna series and a plurality of control units. The first antenna series intersects with the second antenna series to share a predetermined antenna unit among many antenna units. A part of the antenna units is connected in series to extend from a first and a second transmission lines of the predetermined antenna unit to compose the first antenna series, and the other antenna units are connected in series to extend from a third and a fourth transmission lines of the predetermined antenna unit to compose the second antenna series. The control units control the transmission paths between the first to the fourth transmission lines and the antenna units, and switch a leaky beam to different scanning planes, wherein the leaky beam scans with frequency variation through the antenna units.

Abstract: The present invention is related to a coplanar antenna unit and a coplanar antenna. By utilizing the unique properties of meta-material to design 1-D balanced CRLH leaky-wave antenna. The antenna can be realized with the coplanar antenna unit consisting of MIM capacitor and grounded inductor. In this invention, all proposed elements are implemented by planar print circuit broad, so the full-space switched beam scanning antenna has shorter length of leaky-wave antenna and good radiation performance.

Abstract: The present invention discloses a print dipole antenna and manufacturing method thereof. The print dipole antenna has a plurality of resonance frequencies, which comprises a substrate, a ring microstrip line and a ground plane. The ring microstrip line is disposed on one side of the substrate, and the interior of the ring microstrip line is symmetrically disposed with a plurality of parasitic metals. The ground plane is disposed on the other side of the substrate, and has a hollow portion corresponding to the central area of the ring microstrip line. The ring microstrip line has a plurality of end ports including input end ports and output end ports, which may further comprise an open circuit end. The plurality of parasitic metals may be of linear shape or bended in arbitrarily windings. A normal mode signal is fed from the end points of the plurality of parasitic metals.

Abstract: In the present invention, a novel multi-port microwave circuit, also known as a multiple bi-directional circulator, is designed based upon the basis of the EBG characteristic of the meta-materials. Firstly, the concept of the traditional single-layered mushroom structure is extended with the suspending microstrip line to the multi-layered structure. In this way, the multi-layered structure can reveal multi-band EBG characteristic and achieve miniaturization. Moreover, we use three sets of proposed dual-band EBG circuit to be series-connected in a ring-type structure. By using proper impedance matching, the design of the multiple bi-directional circulator is accomplished. It combines the capabilities of the diplexer, the duplexer and the circulator. The triplex bi-directional circulator can integrate three kinds of communication systems with each other, which operates at frequencies comprising GSM 1800 MHz, WiFi 2.45 GHz, and WiMAX 3.5 GHz, respectively.

Abstract: The present invention discloses a tri-frequency duplexer circuit and multi-frequency duplexer circuit. The tri-frequency duplexer circuit comprises a microstrip line circuit, two first mushrooms, two second mushrooms and two third mushrooms. The microstrip line circuit comprises a first Input/Output (I/O) port, a second I/O port, a third I/O port and a fourth I/O port. The two first mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the third I/O port. The two second mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the fourth I/O port. The two third mushrooms are respectively disposed at transmission line paths between the first I/O port and the third I/O port and between the first I/O port and the fourth I/O port.

Abstract: A leaky-wave antenna capable of multi-plane scanning is provided. The leaky-wave antenna includes a substrate, a first antenna series, a second antenna series and a plurality of control units. The first antenna series intersects with the second antenna series to share a predetermined antenna unit among many antenna units. A part of the antenna units is connected in series to extend from a first and a second transmission lines of the predetermined antenna unit to compose the first antenna series, and the other antenna units are connected in series to extend from a third and a fourth transmission lines of the predetermined antenna unit to compose the second antenna series. The control units control the transmission paths between the first to the fourth transmission lines and the antenna units, and switch a leaky beam to different scanning planes, wherein the leaky beam scans with frequency variation through the antenna units.

Abstract: The present invention is related to a coplanar antenna unit and a coplanar antenna. By utilizing the unique properties of meta-material to design 1-D balanced CRLH leaky-wave antenna. The antenna can be realized with the coplanar antenna unit consisting of MIM capacitor and grounded inductor. In this invention, all proposed elements are implemented by planar print circuit broad, so the full-space switched beam scanning antenna has shorter length of leaky-wave antenna and good radiation performance.

Abstract: The present invention discloses a print dipole antenna and manufacturing method thereof. The print dipole antenna has a plurality of resonance frequencies, which comprises a substrate, a ring microstrip line and a ground plane. The ring microstrip line is disposed on one side of the substrate, and the interior of the ring microstrip line is symmetrically disposed with a plurality of parasitic metals. The ground plane is disposed on the other side of the substrate, and has a hollow portion corresponding to the central area of the ring microstrip line. The ring microstrip line has a plurality of end ports including input end ports and output end ports, which may further comprise an open circuit end. The plurality of parasitic metals may be of linear shape or bended in arbitrarily windings. A normal mode signal is fed from the end points of the plurality of parasitic metals.

Abstract: The present invention discloses a tri-frequency duplexer circuit and multi-frequency duplexer circuit. The tri-frequency duplexer circuit comprises a microstrip line circuit, two first mushrooms, two second mushrooms and two third mushrooms. The microstrip line circuit comprises a first Input/Output (I/O) port, a second I/O port, a third I/O port and a fourth I/O port. The two first mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the third I/O port. The two second mushrooms are respectively disposed at transmission line paths between the first I/O port and the second I/O port and between the first I/O port and the fourth I/O port. The two third mushrooms are respectively disposed at transmission line paths between the first I/O port and the third I/O port and between the first I/O port and the fourth I/O port.

Abstract: A multiple-surface antenna, and a method of receiving signals using an antenna, are disclosed. The multi-surface antenna includes a multi-surface dielectric substrate and a conductive trace formed on at least two surfaces of the dielectric substrate. The conductive trace is formed in a predetermined pattern. The predetermined pattern may be a crossing pattern, or a series of symmetric shapes. The multi-surface dielectric substrate, having the trace formed thereon, may then be integrated entirely within a telephone handset. The method includes providing a multi-surface dielectric substrate, printing on at least two surfaces of the dielectric substrate a conductive trace formed into a periodic pattern, receiving at least one signal at the conductive trace, passing the received signal through at least a portion of the conductive trace, and feeding the received signal from the conductive trace to a coupled receiver. The coupled receiver may be a cellular or cordless telephone handset.

Abstract: A printed conductive mesh dipole antenna, and a method of use of the antenna. The printed dipole antenna includes a dielectric substrate 12 and a conductive mesh 14 formed of a plurality of symmetric shapes 18 printed on the dielectric substrate. Each of the symmetric shapes is coupled to at least one other of the shapes, and placed periodically on the dielectric substrate proximate to at least one other of the shapes. The periodic placement of the shapes forms a symmetric pattern of a conductive mesh on the dielectric substrate. The antenna is preferably part of a cellular or cordless telephone handset.

Abstract: A printed conductive mesh dipole antenna, and a method of use of the antenna. The printed dipole antenna includes a dielectric substrate 12 and a conductive mesh 14 formed of a plurality of symmetric shapes 18 printed on the dielectric substrate. Each of the symmetric shapes is coupled to at least one other of the shapes, and placed periodically on the dielectric substrate proximate to at least one other of the shapes. The periodic placement of the shapes forms a symmetric pattern of a conductive mesh on the dielectric substrate. The antenna is preferably part of a cellular or cordless telephone handset.

Abstract: A multiple-surface antenna, and a method of receiving signals using an antenna, are disclosed. The multi-surface antenna includes a multi-surface dielectric substrate and a conductive trace formed on at least two surfaces of the dielectric substrate. The conductive trace is formed in a predetermined pattern. The predetermined pattern may be a crossing pattern, or a series of symmetric shapes. The multi-surface dielectric substrate, having the trace formed thereon, may then be integrated entirely within a telephone handset. The method includes providing a multi-surface dielectric substrate, printing on at least two surfaces of the dielectric substrate a conductive trace formed into a periodic pattern, receiving at least one signal at the conductive trace, passing the received signal through at least a portion of the conductive trace, and feeding the received signal from the conductive trace to a coupled receiver. The coupled receiver may be a cellular or cordless telephone handset.

Abstract: A dual strip antenna that includes first and second conductive strips, each made from a conductive material. The first and second strips are separated by a dielectric substrate having a predetermined thickness. The first strip is electrically connected to the second strip at one end. A coaxial signal feed is coupled to the dual strip antenna. A dual strip antenna can be reduced in overall size by utilizing a periodic mesh patterned conductive surface in place of a solid continuous conductive surface. The periodic mesh pattern maintains the relative voltage and current relationships across the antenna strip while enabling a reduction in physical size. Any uniform periodic mesh pattern may be used and the periodic mesh pattern may be utilized for both strip elements. A brick-wall mesh pattern results in approximately 10% reduction in size over a solid continuous dual strip antenna.