An example of a high-frequency semiconductor device includes two unit semiconductor devices. Each of the two unit semiconductor devices has a ground substrate, a high-frequency semiconductor element, an input-side matching circuit, an output-side matching circuit, a side wall member, an input terminal, and an output terminal. The ground substrate has heat-radiating property. The high-frequency semiconductor element is provided on the ground substrate. The input-side matching circuit is connected to the high-frequency semiconductor element. The output-side matching circuit is connected to the high-frequency semiconductor element. The side wall member surrounds at least the high-frequency semiconductor element. The input terminal is connected to the input-side matching circuit. The output terminal is connected to the output-side matching circuit. The two unit semiconductor devices are coupled to each other at upper edges of the side wall members.

High-frequency semiconductor device

A light-transmitting (fluorescent) sintered body formed of specific substances different from the prior art materials, solving problems that the performance or efficiency, uses and manufacturing methods are limited which have not been solved with the prior art light-transmitting sintered body and which provides a light-emitting tube and an electric discharge lamp using a light-transmitting (fluorescent) sintered body formed of the specific substance. Provided are a light-transmitting sintered body mainly formed of a compound having a Mugnetplumbite structure or a β-alumina structure except for aluminum oxide, a light-transmitting sintered body mainly formed of a compound containing rare earth elements with an ionic valence of two, aluminum element and oxygen element as main components and an light-transmitting sintered body formed of mainly of a compound containing elements with an ionic valence of two except for rare earth elements, rare earth elements and oxygen element as main components.

Light-transmitting sintered body, light-emitting tube and electric discharge lamp using same

A wireless communication device includes a wireless communication module and an allocator. The wireless communication module wirelessly communicates with a plurality of other wireless communication devices. The allocator allocates time resources and frequency resources to a plurality of traffics which periodically occur between the wireless communication device and the plurality of other wireless communication device in descending order of resource utilizations. The resource utilization of a given traffic corresponds to a time rate at which the given traffic uses a frequency resource allocated thereto. The allocator allocates the frequency resource, which is arranged at a position closer to an end than a center frequency, to a traffic which is the highest in resource utilization.

Wireless communication device and wireless communication method

An antenna system comprises: a main antenna; a first sub antenna arranged in such a way that the first sub antenna adjoins the main antenna in the X direction which is the orientation of a beam width of the main antenna to be reduced and the beam axis of the first sub antenna coincides with the beam axis of the main antenna; and a second sub antenna arranged in such a way that the second sub antenna adjoins the main antenna in the Y direction perpendicular to the X direction and the beam axis of the second sub antenna coincides with the beam axis of the main antenna; wherein an antenna beam of the antenna system is scanned in a direction other than the X and Y direction and multiplication is carried out between a signal received with the main antenna and each signal received with each sub antenna on the condition that phases of these signals coincide with each other so that a two-dimensional reduction in a beam width is achieved. When the second sub antenna does not have an isotropic antenna pattern in the X direction and the beam-scanning is carried out in the X direction, a one-dimensional reduction in a beam width and side lobes is achieved. When the second sub antenna does not have an isotropic antenna pattern in the X direction and the beam-scanning is carried out in a direction other than the X and Y direction, a two-dimensional reduction in a beam width and a one-dimensional reduction in side lobes is achieved. In the case that the first and second sub antennas do not have isotropic antenna patterns in the Y and X direction respectively and the antenna beam is scanned in a direction other than the X and Y direction, a two-dimensional reduction in a beam width and two-dimensional reduction in side lobes are achieved.

Method for processing antenna patterns

After each received signal in the same two antennas of the monopulse power feed system are inputted into a hybrid circuit, a sum signal Σ and a difference signal Δ are formed, and they are demodulated in detection circuits, zero is outputted if the value of the sum signal Σ is equal to or smaller than the value of the difference signal Δ, otherwise the value subtracted the difference signal Δ from the sum signal Σ outputted, in a signal processing section Thus, beam compression and reduction of a side lobe are performed

Processing method for antenna pattern

PURPOSE:To decrease the number of equivalent phase shifters per one element antenna, by adjusting the phase shift of an output of one element antenna out of the two element antennas corresponding to two outputs of a variable distributors and eliminating a phase shifter to be connected to an antenna. CONSTITUTION:A high frequency signal from a transmitter 4 is distributed and phase-shifted at variable distributors 8-1-8-n so as to obtain a desired phase distribution in all element antennas 1-1, 1-2-1-2n-1, 1-2n and the element antennas 1-1, 1-3-1-2n-1 of an odd number order, and phase-shifted at phase shifters 2-2, 2-4-2-2n so as to obtain a desired phase distribution in the element antennas 1-2, 1-4-1-2n of an even number order. Since the phase can be adjusted for the output of the element antennas 1-1, 1-3-1-2n-1 of an odd number order with the variable distributors 8-1-8-n, phase shifters to be connected to the element antennas can be eliminated.

Phased array antenna

PURPOSE:To secure adjustment for the power distribution ratio of the output waveguide provided by branching with a simple method by installing the impedance matching circuit to the input waveguide at the position deviated from the center line of the input waveguide CONSTITUTION:Output waveguide 2 is connected to one H face of input waveguide 1 featuring a rectangular cross section, and output waveguide 3 is connected to the other H face each The same measurement is secured for the rectangular cross section between waveguide 2 and 3, thus forming a T-type waveguide branching unit Conductor bar 4 is inserted to the position deviated from center line 5 for waveguide 1 of the T-type waveguide branching unit in order to adjust the distribution ratio of the magnetic force line to waveguide 2 and 3 Thus an adjustment is given to the ratio of the power to be supplied to waveguide 2 and 3, and at the same time an impedance matching circuit is formed to waveguide 1 This matching circuit consists of conductor bar 4 the both ends of which are connected to both faces E of waveguide 1

Tttype waveguide branching unit

PURPOSE:To reduce the ground wire inductance by a method wherein source bonding pads for ground are grounded by being arranged also on the side of a drain bonding pad. CONSTITUTION:As the construction of the surface wiring part of the titled device, source bonding pads 3a are arranged also on the side of the drain bonding pad 5, so that the grounding for the operating part 2 can be carried out with source bonding wires 5 via source bonding pads 3 and additionally with source bonding wires 6a via source bonding pads 3a. This manner can reduce the ground wire inductance to approx. 1/2 and improves the escape of heat evolving in the operating part; accordingly, the titled device of high reliability can be obtained also by reduction of thermal inductance.

Field effect ultrahigh frequency transistor device

PURPOSE:To constitute the device with low cost and to suppress the dispersion to desired amplitude ratio for each antenna, by using an equal amplitude distributor to the distributor of the final stage only connected to an element antenna and using an unequal amplitude distributor for other distributors. CONSTITUTION:An input signal (a) is inputted to an unequal amplitude distributor 2 having difference for the output sharing ratio, and outputs (b), (b') are supplied to equal amplitude distributors 1, 1 having equal output sharing ratio. Four element antennas 3 have supplies of outputs (c'), (c), (c), (c') of the distributors 1, 1. Thus, power supply having desired weighting can be made to element antennas by using one unequal and two equal amplitude distributors. In feeding 2 sets of elements, the distributor at the (n-1)th stage uses an unequal amplitude distributor and the equal amplitude distributor directly connected to the element antenna is used for the n-th stage distributor. Thus, the number of the unequal amplitude distributors can be reduced to constitute low cost device, and the dispersion to desired amplitude ratio for each antenna can be decreased.

Power feeding circuit for array antenna

PURPOSE:To obtain an array factor having a desired low side lobe, by decreasing the number of distributors, through an array formed from subarrays assembled with several elements of the element amplitude distribution. CONSTITUTION:A transmission power is inputted to a plurality of equal amplitude two-division devices 3a which distribute the power to element antennas I1, I2... constituting subarrays via n/2 distributors 2b distrubuted with subarrays of element arrays, but a coupling array factor (e) is close to an array factor of a linear array antenna of a low side lobe. Thus, the element amplitude distribution is formed into subarrays, the device is made low in cost and the control time can be reduced remarkably in controlling the amplitude of elements. In place of the equal amplitude two-division device 3a, an equal amplitude three-division device or an equal amplitude m-division device can be used.

Suga Jirou

Papers

Phased array antenna

Tttype waveguide branching unit

Field effect ultrahigh frequency transistor device

Power feeding circuit for array antenna

Array antenna device