Nec Corporation

Nippon Electric Co., Ltd.

Masatoshi Shimizu

Yasuhiro Ando

Naoyuki Orihashi

Togo Miyazaki

Hironobu Ishizuka

Shouji Tsurumoto

A mounting base () is fixed to an antenna () or an antenna bracket () for supporting the antenna (). A baseband unit () and an RF unit () are fixed to the mounting base (). The baseband unit () fixed to the mounting base () is disposed to face a back part () of the antenna () and to form a space between the back part () and the first enclosure (). The RF unit () fixed to the mounting base () is disposed in the space formed between the back part () of the antenna () and the baseband unit () and is coupled to a waveguide flange () of the antenna (). Thus, for example, in a configuration of a point-to-point wireless apparatus in which an RF unit and a baseband unit are separated, restrictions on installation space of the apparatus can be facilitated.

Wireless communication apparatus and structure for mounting communication equipment

Antennaand radio communication apparatusinclude mount portionsand, flat proximity opposing surfacesand, and waveguide portionsandpenetrating through proximity opposing surfacesand, respectively. For example, in proximity opposing surfaceof radio communication apparatus, choke grooveis formed outside waveguide portion. With mount portionsandof antennaand radio communication apparatusabutted against and fixed to each other, proximity opposing surfacesandare set parallel to, and directly opposite to each other with a clearance interposed therebetween so that waveguide portionsand, opposite to each other and with a clearance, form a waveguide.

Connection structure between antenna apparatus and radio communication apparatus

An antenna adjuster includes a clamp unit 10 including an upper and a lower clamp disposed one above another in the height direction of a pole 2, the upper and lower clamps including paired clamp members 11 and 14, and 12 and 13, respectively. The paired clamp members face each other via the pole and are secured to the pole so as to be capable of position adjustment in the height and peripheral directions of the pole 2. An antenna mounting member 20 is mounted on the upper clamp member 11 for rotation about an elevation angle rotation axis member 23 and secured to the antenna 1. An azimuth angle adjusting member 30 is capable of being displaced through an elongate hole 32 formed in the upper clamp member 11 and a threaded hole 33 formed in the lower clamp member 13. An elevation angle adjusting member 40 is capable of being screwed through an engagement hole 42 formed in the antenna mounting member 20 and a nut portion 43 of the upper clamp 11 to push and pull the antenna mounting member 20.

Antenna adjuster

In a circuit for driving a plasma display panel, a blocking oscillator produces pulses varying between a positive and a negative voltage. Transistors controlled by first selection signals selectively supply first electrodes of the panel with either the complete bipolar pulses, or with only a predetermined one of the positive or negative pulse components. Further transistor switches controlled by second selection signals selectively connect and disconnect second display panel electrodes to ground. A constant voltage is applied to the disconnected second electrodes. A gas discharge occurs at each intersection of the first electrodes supplied with the full bipolar pulse wave and the grounded second electrodes. In accordance with one aspect of the present invention, production of the driving pulses may be suspended either by a preselected one of the first and second selection signals or by coincidence logic operating upon preselected first or second selection signals.

Growing community of inventors

Tokyo, Japan

Masatoshi Shimizu