摘要:
A planar antenna radiating structure (30) comprising an array of continuous transverse stubs (11a) having a stepped configuration arranged in a ground plane (15) of a parallel-plate waveguide (12). Control of the complex reflection coefficient of the aperture of the radiating structure over a range of operating frequencies and scan angles is accomplished using parallel-plate waveguide modes through a choice of stub length(s), stub height(s), inter-stub spacings, parallel-plate separation and the properties of dielectric media used for the parallel-plate waveguide and stubs.
摘要:
A dielectric slab (23) is arranged on one surface of a ground plane (21) to form a transmission guide for transmitting an electromagnetic wave along the surface from one end to the other end between the dielectric slab (23) and the ground plane (21). A perturbation (24) is loaded on the dielectric slab (23) to leak the electromagnetic wave from the surface of the dielectric slab (23). A feed (30) supplies an electromagnetic wave to one end of the transmission guide formed by the ground plane (21) and dielectric slab (23). A dielectric layer (22) is interposed between the ground plane (21) and the dielectric slab (23), and has a lower permittivity than that of the dielectric slab (23).
摘要:
The present invention provides a dielectric leaky-wave antenna having a single-layer structure which is effective for realizing a highly efficient low-cost antenna in a quasi-millimeter wave zone in particular. This dielectric leaky-wave antenna includes a ground plane, a dielectric slab which is laid on one surface of the ground plane and forms a transmission guide for transmitting an electromagnetic wave from one end side to the other end side between itself and the ground plane along the surface, perturbations which are loaded on the surface of the dielectric slab along the electromagnetic wave transmission direction of the transmission guide at predetermined intervals and leak the electromagnetic wave from the surface of the dielectric slab, and a feed which supplies the electromagnetic wave to one end side of the transmission guide.
摘要:
A dielectric slab (23) is arranged on one surface of a ground plane (21) to form a transmission guide for transmitting an electromagnetic wave along the surface from one end to the other end between the dielectric slab (23) and the ground plane (21). A perturbation (24) is loaded on the dielectric slab (23) to leak the electromagnetic wave from the surface of the dielectric slab (23). A feed (30) supplies an electromagnetic wave to one end of the transmission guide formed by the ground plane (21) and dielectric slab (23). A dielectric layer (22) is interposed between the ground plane (21) and the dielectric slab (23), and has a lower permittivity than that of the dielectric slab (23).
摘要:
Methods of fabricating air-filled true-time-delay, continuous transverse stub array antenna. A plurality of extruded sections that are physically independent of one another are fabricated. The plurality of extruded sections are arranged in a predefined pattern defining the structure of the array antenna. Adjacent surfaces of the extruded sections form waveguides of the array antenna. The plurality of extruded sections are joined together at their respective ends to form the array antenna. The plurality of extruded sections may be joined using a plurality of end plates. The plurality of extruded sections and end plates may comprise metal or plastic. If the extruded sections are plastic, they are metallized (44) using a process such as vacuum deposition, electroless plating, or lamination during the extrusion process. The end plates are sealed to the extruded sections to form the array antenna structure.
摘要:
The present invention provides a planer antenna which decreases in transmission loss, improves in aperture efficiency, increases in productivity, and reduces in cost when it is used in a high-frequency band such as submillimeter and millimeter wave bands, and which allows multibeam scanning and electronic-beam scanning with a thin, simple structure. According to one aspect of the present invention, the planar antenna includes a planar ground conductor, a plurality of radiating dielectrics arranged in parallel and at established intervals on a surface of the ground conductor, a plurality of perturbations for radiating an electromagnetic wave, the perturbations each having a given width and being arranged at established intervals on a top surface of each of the plurality of radiating dielectrics along a longitudinal direction thereof, and a feeding section provided alongside one end of each of the plurality of radiating dielectrics, for feeding an electromagnetic wave to a line constituted of each of the radiating dielectrics and the ground conductor.
摘要:
An improved antenna device is provided which is easy to be made compact in size and easy to deflect a beam at a high speed. Further, a transmitting/receiving apparatus using the improved antenna device is provided which is capable of performing a detection within a large range. In particular, a primary radiator and a first transmission line combined with the primary radiator are provided on a movable section, a second transmission line electromagnetically combined with the first transmission line and a dielectric lens with a position of said primary radiator serving as a generally focal point surface are provided on a fixed section. Further, a structure is provided capable of deflecting the beam by displacing the movable section. Also, means is provided to detect the position of the movable section and a control means is provided for displacing the movable section in accordance with a position designating signal of the movable section.
摘要:
A continuous transverse stub antenna array (10) comprises phase tuning sections (11) disposed between adjacent stub elements (13). The antenna array (10) includes a sheet (12) of dielectric material having a plurality of transverse stub elements (13) extending from a first surface (14) thereof. A first metal layer (16) is disposed on the first surface (14) and side surfaces (15) of each of the stub elements (13), and a second metal layer (16) is disposed on a second surface (17) of the sheet of dielectric material that forms a ground plane (18) of the array (10). A plurality of tuning sections (11) are formed in the sheet (12) of dielectric material and are disposed between each of the stub elements (13) that extend laterally across the sheet (12) of dielectric material. The plurality of tuning sections (11) have a cross sectional shape in the form of an inverted T.
摘要:
An electronically scanned antenna (20) that is manufactured using semiconductor material and device fabrication technology. The antenna (20) has a semiconductor substrate (13) having a plurality of stubs (15) projecting from one surface. The semiconductor substrate may be silicon, gallium arsenide, or indium phosphide, for example. A first conductive layer (11) formed on the surfaces of the semiconductor substrate (13) and along sides of the stubs so that the stubs (15) are open at their terminus. The conductive layers (11, 12) form a parallel plate waveguide region (14). A diode array (21) having a plurality of diode elements is formed in the semiconductor substrate (13) that are disposed transversely across the semiconductor substrate (13) and longitudinally down the semiconductor substrate (13) between selected ones of the plurality of stubs (15). The diode array (21) may comprise an array of Schottky or varactor diodes, for example. The diode array (21) provides a voltage variable capacitive reactance in selective regions of the waveguide region (14). A beam steering computer (25) is coupled to the plurality of diode elements of the diode array (21) which controls the voltage applied thereto to control steering of a beam radiated by the antenna (20).
摘要:
The invention provides an antenna in which a signal is directly transferred from a planar dielectric transmission line to a primary radiator without having to perform transmission mode conversion from the planar dielectric transmission mode to another mode such as a coplaner transmission mode, a mictrostrip transmission mode, or a waveguide transmission mode thereby eliminating the transmission loss which would otherwise occur due to the transmission mode conversion. A dielectric resonator (1) is disposed in the vicinity of the end of the planar dielectric transmission line (PDTL) formed between two slots (24, 25) disposed on both sides of a dielectric plate (23). Furthermore, a slotted plate (2), a lens supporting base (3), and a dielectric lens (4) are disposed one on another.