Abstract: The invention discloses a leaky-wave dual-antenna system comprising a transmitting antenna array and a receiving antenna array. The transmitting antenna array comprises plural first microstrips and plural corresponding first differential circuits, and each of the first differential circuit matches the corresponding first microstrip by a L-type matching network; the receiving antenna array comprises plural second microstrips and plural corresponding second differential circuits, and each of the second differential circuit matches the corresponding second microstrip by a L-type matching network. A first end and a second end of each of the first differential circuits are respectively connected to the corresponding first microstrip; a third end and a fourth end of each of the second differential circuits are respectively connected to the corresponding second microstrip.

Abstract: An ultra-wideband antenna array architecture includes a first array of radiating elements, a second array of radiating elements, and a third array of radiating elements, with their respective element widths proportionately ascending in size. In one configuration, the first array radiating element width is half a wavelength at the highest frequency of operation, the second array element width is twice the first width, and the third array element width is twice the second width. The first, second, and third arrays are positioned in a wavelength-scaled lattice wherein the wavelength scaling is based on design operative frequencies and whereby adjacent actively-radiating elements for an operative frequency are aligned so as to produce constructive interference when powered up. Feed means such as a diplexer with a selected-band frequency control then provides power to each array.

Abstract: An antenna for receiving electric waves, a manufacturing method thereof, and an electronic device with the antenna are provided. The antenna includes a substrate, a grounding unit, a radiator, a coupling unit, and a signal transmission line. The substrate has a first surface and a second surface which are opposite to each other. The grounding unit is disposed on the first surface of the substrate. The radiator is disposed on the second surface of the substrate and connected to the grounding unit. The coupling unit is disposed on the first surface of the substrate and partially overlaps the projection of the radiator. The signal transmission line includes a signal line and a ground line, the signal line being connected to the coupling unit while the ground line being connected to the grounding unit.

Abstract: An antenna having a number of operating frequencies includes a feed element, a ground element, and a number of conductive antenna tracks. The conductive antenna tracks extend outward from the feed element and return back to the ground element. When the conductive antenna tracks are located in a same plane, areas defined by the conductive antenna tracks are not overlapped with one another. When parts of the conductive antenna tracks are located in different planes, multiple frequency bands are formed respectively by multiple resonant frequencies corresponding to the conductive antenna tracks.

Abstract: A WWAN printed circuit antenna includes three monopole antennas in the printed circuit board. Signals are fed in from the feed monopole antenna. The first and second radiating monopole antennas are actuated by the feed monopole antenna in an electromagnetic coupling way. Therefore, a three-dimensional structure derived from the planar inverted-F antenna can be replaced, and the limitation of space usage can be overcome.

Abstract: A lightweight and compact design provides for a portable antenna device that is able to receive over the air digital broadcasts. Such a device can receive a large number of high definition digital signals, over a wide spectrum. The device can be powered by a number of approaches, including receiving power over a USB or similar connection. Such a device thus can be used with home analog or digital televisions as well as portable digital media devices. The device includes an extendable, substantially rectangular antenna element that is shaped to receive the digital signals over a wide band.

Abstract: A multi-band antenna arrangement having a plurality of resonant modes and including a ground plane; and a first antenna forming a loop-like structure between a ground point and a feed point, wherein the first antenna is located in proximity to the ground plane and has resonant modes at X/2 and X.

Abstract: An antenna apparatus that may be adapted to various environments. The antenna apparatus includes a radiation unit to transmit and receive in a 360° radius including a plurality of radiators, each radiator configured to radiate a main emission pattern in different direction; and a switch unit configured to selectively operate each of the plurality of radiators.

Abstract: According to one embodiment, an antenna device includes a short circuit path, a first open-ended element, a feed side element, a second open-ended element, and a short circuit element. One end of the short circuit path is connected to a ground point near a feed point. The first open-ended element extends from another end of the short circuit path. The feed side element extends from near the feed point in a direction in which the first open-ended element extends with an edge close to ground. The second open-ended element extends from near an end of the feed side element in the direction in which the first open-ended element extends. The short circuit element connects between an end of the first open-ended element and a point on an edge of the feed side element opposite the edge close to the ground or a point on the second open-ended element.

Abstract: An antenna having two beams low in correlation and effective for MIMO is provided. The antenna includes a first array antenna and a second array antenna. The first array antenna and the second array antenna have directivities different in direction, respectively. A maximum radiation direction of a combined beam from the first array antenna is oriented to a direction of ?1. A maximum radiation direction of a combined beam from the second array antenna is oriented to a direction of ?2 corresponding to a null point of the combined beam from the first array antenna.

Abstract: An antenna architecture containing a broadband resonant cap positioned over a radiating patch is disclosed. The resonant cap consists of a rectangular resonant patch at the center with parasitic patches in close proximity of the four edges of the resonant patch. The parasitic patches may be coplanar with the resonant patch or may be mounted at an angle with respect to the vertical axis of the resonant patch. The resonant cap reduces the HPBW of the emitted radiation and improves emission directivity.

Abstract: An antenna module includes an antenna and a connection line. The antenna receives and sends a signal for wireless communication. The connection line includes a first terminal electrically connected to the antenna, a second terminal electrically connected to an external device and a grounding portion interposed between the first and second terminals.

Abstract: An antenna device for operating in a predetermined frequency band has a resonator section, a semiconductor section and an antenna section. The resonator section includes a first conductor section, a dielectric section, and a second conductor section for specifying a reference potential against each section which is arranged so as to oppose the first conductor section through the dielectric section. A semiconductor section is arranged so as to be sandwiched between the first conductor section and the second conductor section. The antenna section uses the second conductor section as a grounding conductor, is substantially spherical, makes at least its surface electroconductive, and is arranged on the first conductor section.

Abstract: To provide a dual polarized antenna capable of reducing correlation between antenna elements. A dual polarized antenna is constituted by a vertically polarized antenna and a horizontally polarized antenna formed on a printed circuit board and radiates two kinds of polarized waves.

Abstract: A circular polarized signal receiving antenna including an active element having first and second ends separated by a gap, a dimension of the active element, between the first and second ends thereof, corresponding to approximately one wavelength of a resonant operating frequency of the antenna. A feed-point is coupled to the active element, wherein the feed-point is located approximately one-quarter of the wavelength from the first end of the active element and approximately three-quarters of the wavelength from the second end of the active element. In one embodiment, the feed-point is coupled to the active element.

Abstract: Provided is a multi-band internal antenna of a symmetry structure having stub, in which a size of the internal antenna can be reduced by stacking loop antennas, a broadband characteristic can be obtained in a high frequency band by connecting the stub to a top patch of the antenna, and a reduced SAR and an omni-directional radiation pattern can be obtained by configuring an antenna patch in a symmetry structure.

Abstract: Disclosed is a 3D inverted F-antenna for easy production, fast assembly, wider bandwidth that provides excellent capacity of radiating and receiving wireless signal inside wireless communication devices. The 3D inverted F-antenna includes a ground plate. A radiating plate has a hole wherein the dimensions of the radiating plate and the hole are decided by ½ of the predetermined resonance wavelength. A shorting unit is connected to the ground plate and the radiating plate. A media is located between the ground plate and the radiating plate for isolating the ground plate and the radiating plate. A conductive signal feeding device is located in the ground plate and electrically coupled to the radiating plate for transmitting signal.

Abstract: The present invention relates to an omni-directional, orthogonally propagating, one-quarter wavelength folded loop antenna. The antenna may be embodied in a wire, flat metal stock or printed configuration. The antenna comprises a folded loop antenna comprising an upper and lower horizontal element with a first and a second end and each of a length that is approximately forty-five percent of the overall one-quarter wavelength of the folded loop antenna connected by a vertical element. The antenna further comprises a ground plane having a minimum vertical length of three-sixteenths of a required wavelength and a horizontal width of a minimum of one-fifth of a wavelength as measured from the physical center of a first end of an antenna feed element. Further aspects of the folded loop antenna system are enabled with polarization diversity and selectable secondary resonance frequency and 10 dB return loss bandwidth.

Abstract: An antenna array comprises a plurality of antenna loops disposed to define a portal or passageway or other detection region in which the plural antenna loops transmit and/or receive electromagnetic signals. A processor coupled to the plural antenna loops processes at least the received signals and/or transmitted signals. The plural antennas may be arrayed in a rectangular array, on hanging flexible substrates or other suitable arrangement, and may be coupled to the processor by a filter or selective switch. The processor may be coupled to a utilization system for cooperating therewith for performing a desired function.

Abstract: An air cooled transceiver enclosure which includes multiple cooling posts about the enclosure. The transmitter and receiver antennas are planar mounted above the cooling posts and the cooling posts are selected so as not to interfere with the radiation and form part of the ground plane. The cooling posts are, in general, of a height which is less than one-quarter the wave length of the frequencies to be used. In accordance with another feature of the present invention, the transceiver base unit with cooling posts and mounted antennas has an easily attachable cover which is removably engaged to the transceiver base unit and offset from the planar antennas which lie above the base unit. In accordance with another feature of the invention, the transceiver base unit with cooling posts and mounted antennas has an easily attachable cover which is removably engaged to the transceiver base unit and offset from the planer antennas which lie above the base unit.

Abstract: A transmission system delays a carrier wave and program audio in the digital domain. The carrier wave and the program audio are converted to analog and the carrier wave is modulated by the program audio. The system includes a master oscillator that generates a digital carrier wave. The digital carrier wave is transmitted to a delay stage that delays the digital carrier wave by a certain delay value. The system further receives an analog or digital signal that is representative of programming. If an analog signal is received, the signal is transmitted to an analog-to-digital converter where it is converted to digital audio. The digital audio is then transmitted to a delay stage that delays the digital audio by the same delay value. The digital carrier wave and the digital audio are converted to an analog carrier wave and analog audio respectively. A modulator modulates the analog carrier wave by the analog audio and sends the amplitude modulated carrier wave to a power amplifier.

Abstract: A patch type radiation electrode is formed in the central area of the upper face of a dielectric substrate. First and second microstrip type radiation electrodes are formed on respective right and left sides of the patch type radiation electrode so as to sandwich the patch type radiation electrode. The first and second microstrip type radiation electrodes are symmetrical with respect to the patch type radiation electrode. If a microstrip type radiation electrode is formed on either one of the right and left sides of the patch type radiation electrode, the directivity of radio waves of the patch type radiation electrode become unsymmetrical, due to effects of the microstrip type radiation electrode. On the other hand, the directivity of radio waves of the patch type radiation electrode can be made symmetrical by forming the microstrip type radiation electrodes on both of the right and left sides of the patch type radiation electrode.

Abstract: The invention relates to a device for changing the polarization of an incident electromagnetic wave. Existing devices to change the polarization of an incident electromagnetic wave preserve signal decoupling, i.e., the relation between useful polarization and cross-polarization of the incoming signal. Furthermore, known prior art devices are far too big for many applications. The aim of the inventive device is to improve signal decoupling. During transmission of an electromagnetic wave through the transmission polarizer, the cross-coupled fraction of an incoming signal is greatly reflected thus leading to improved decoupling of the transmitted signal. Furthermore, the transmission polarizer can be manufactured in the form of a single planar printed board. The transmission polarizer is particularly useful to change the polarization of an incident electromagnetic wave, i.e.

Abstract: A small helical antenna with broad fan radiation pattern provides easy impedance matching and high radiation efficiency. It is composed of a dielectric cylinder, a plurality of radiation conductors arranged on the outer surface of the dielectric cylinder, a matching conductor arranged on the upper inner surface of the dielectric cylinder that cancels inductive reactance, and a plurality of feeder conductors arranged near the radiation conductors on the lower inner surface of the dielectric cylinder and lowering the impedance of the helical antenna.

Abstract: An improved transceiver antenna is designed for mounting on vehicles where, for aerodynamic reasons, vertical orientation is undesirable. It is an object of the present invention to provide a high-gain antenna which, even when mounted at a declination of up to 40.degree. from the vertical, maintains the most smoothly curved possible antenna characteristic. This is achieved by winding four serially connected coils (SP1-SP4) on a rod (12) of dielectric material, with the third coil reverse-wound with respect to the second, with a radiating element (13) connected to the free end of the fourth coil, the lengths of the coils and radiating element being selected to be, respectively, 1/4, 1/4, 1/8, 1/8, and 3/8 of the median wavelength. Upon mounting at an angle of 40.degree. to the vertical, this antenna has an optimal antenna characteristic curve.

Abstract: A device for receiving intensity modulated optical input signals, and producing an electronic output signal having a magnitude corresponding to the sum of the intensities of the input signals. The device comprises a plurality of photodetectors for receiving the input signals, the photodetectors being connected in parallel between first and second conductor lines. The photodetectors are reverse biased, preferably through a low pass filter, and a high pass filter is positioned between the conductor lines and a pair of output terminals at which the output signal is produced. The device may also include frequency compensation and/or impedance matching means connected between the high pass filter and the output terminals. Where the input signals are provided on fiber-optic cables or optical waveguides, means may also be provided for positioning the fiber-optic cables or waveguides such that the input signals are efficien=tly coupled onto the photodetectors.