Removable radio transceiver station fitted on a mast

Abstract: The radio transceiver station provides on a mast (1), together with the other working parts of the station, two housing rigid cases with a double-body structure and with opening turned otuwards. Said housing rigid cases with a double-body structure are formed by an outside part (2) reflecting the electromagnetic waves connected with a inner part (3) which absorbs the said waves and they have centrally located two antennas: the first body has an antenna (4) turned towards a remote terminal to detect radio signals and the second one an antenna (5) which radiates signals to the new zone to be covered. In order to protect the inner space the opening of the rigid bodies is ermetically closed by a transparent material (6).

Description: The invention refers to a system to decouple electromagnetically two antennas of a removable radio transceiver station, the first one deriving signals from a remote terminal, the second one radiates the said signals to a new zone to be served; thus enlarging the net broadcasting area; such a system permits that the two antennas can be accommodated one near the other on an only mast to be mounted both on the ground and on a building. GB-A-2 295 748 shows such a radio transceiver station. The said radio transceiver stations are of great importance as they can widen the Italian radio net and in particular the Italian cellular radio-telephone system. First of all it should be borne in mind that while in lowlands the radio net coverage of the territory can be actuated by means of fixed radio stations, where high ground forms closed spaces such as valleys, gorges, tunnels, etc., thus obstructing the penetration of radio signals, only mobile or removable radio stations can be used but at high cost. In the first case the said high cost is due to mobile operative transceivers the use of which usually depends upon special contingencies ; in the second case high cost is due to the fact that mobile operative transceivers need two distinct operative sections to be mounted at a great distance one from the other, or, alternatively, a barrier, i.e. the body of a building or a high ground such as the top of a mountain to be placed between them. Such a contrivance is necessary to prevent that the radio signal, which is radiated from the antenna turned towards the remote terminal, is detected by the other aerial radiating the new zone to be served thus blocking the repeater process. The invention is defined by the appended claims. The system provides a device which solves the problem of the electromagnetic decoupling of the two antennas by placing them into special housings with a double-wall case, wherein an outside part reflecting the electromagnetic waves is connected with an inner part which absorbs the said waves; the said housing having some openings so that the first antenna can detect radio signals and the second one can radiate them. By this arrangement the two antennas can be accommodated one near the other on an only mast in a fixed stationary point of the station. Principally, this arrangement improves the amovable transceiver stations fundamentally by means of an equipment to be fitted on a mast located in an only station point. More precisely the present system allows: a) a reduction in the manufacturing costs as only operative radio section is used; b) a great reduction in the assembling costs as the said system can be installed in an only station point and anywhere; c) a simplified radio net planning as the said stations can be located anywhere and no preliminary survey of the zone is necessary to find out the best location thereof. The invented system and the different ways to realize it are illustrated in the drawings. Fig.1 shows a longitudinal section view of a removable station, which is the object of this invention, accommodated on a mast on the ground and featuring two rigid housing structures with a double-body case 2-3 orientated in an opposite direction. Fig. 2 shows a perspective view of the said removable station illustrated in fig. 1. Fig.3 shows a perspective view of a structure with a double-body housing in the shape of a truncated cone 12. Fig. 4 shows a perspective view of a housing structure with a double-body housing in the shape of a truncated pyramid 14. The system provides-mounted on a support 1 together with the other working parts of the station-two housing rigid cases with a double-body structure and with opening turned outwards. The said housing rigid cases with a double-body structure are formed by an outside part 2 reflecting the electromagnetic waves connected with a inner part 3 which absorbs the said waves; the rigid bodies thereof have centrally located two antennas, the first body has an antenna 4 turned towards a remote terminal to detect radio signals, the second one an antenna 5 which radiates signals to the new zone to be covered. A shield of transparent material 6 seals the opening of the said rigid holding bodies hermetically in order to protect the inner space thereof. In a preferred embodiment the removable transceiver station features two rigid housing bodies with a double-structure 2-3 integral with mast 1 and located in the upper part thereof; one of these housing bodies contains the receiving antenna 4 and the other the radiating antenna 5; below there is a repeater 7 powered by a feeding apparatus 8 by means of cable 9: From repeater 7, by means of ducts in coaxial cable featuring predeterminating coaxial connectors on both inputs, a first line 10 connects the first antenna 4 while the second line 11 connects the second antenna 5. According to a possible realization of the present invention, the rigid housing bodies can be put into effect with the external side 2 thereof made out in foil and the outside part 3 thereof in a spongy material with a graphitic base. As regards the type of antenna to be installed, the present invention features double-body housing cases with a housing in the shape of a truncated cone' 12 with a transparent wall 13 and double-body holding cases with a housing in the shape of a truncated pyramid 14 with a transparent wall 15.

Claims: Removable radio transceiver station fitted on a mast (1) together with other working parts of the station and providing two rigid housing cases, each with a double-wall structure (2-3) and an opening turned outwards; whereby each of the rigid housing cases with a double-wall structure is formed by an outside wall (2) reflecting the electromagnetic waves connected with an inner wall (3) which absorbs the said waves; whereby each of said rigid housing cases has centrally located an antenna, the first case has its antenna (4) turned towards a remote terminal to detect radio signals, the second one has its antenna (5) turned so that it radiates signals to a new zone to be covered; and where in order to protect the inner space of the cases each opening of the rigid cases is hermetically sealed by a transparent material (6). Removable radio transceiver station fitted on a mast, according to claim 1, characterized in that the two rigid housing cases with a double wall structure (2-3) are located in the upper part of the mast (1), one of these housing cases contains the receiving antenna (4) and the other one the radiating antenna (5), whereby below the cases a repeater (7) is powered by a feeding apparatus (8) and fed by means of cable (9); from the repeater (7), by means of coaxial cables featuring predeterminating coaxial connectors on both ends, a first line (10) connects the first antenna (4) while a second line (11) connects the second antenna (5). Removable radio transceiver station fitted on a mast, according to claim 1, characterized in that the rigid housing cases are realized with the outside wall (2) thereof made of foil and the inner wall (3) thereof made of a spongy material with a graphitic base. Removable radio transceiver station fitted on a mast, according to claim 1, characterized in that the rigid housing cases are provided either in the shape of a truncated cone (12) with a transparent wall( 13) or in the shape of a truncated pyramid (14) with a transparent wall (15).

Inventors: BICILI LORENZO, PALMIERI FABIO, BICILI, LORENZO, PALMIERI, FABIO
Applicants: BICILI LORENZO, PALMIERI FABIO, BICILI, LORENZO, PALMIERI, FABIO
Application year: 1996
Main classification: H01Q1
IPC codes: H01Q1, H04B1