JPH09172314A - Terminal for portable communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize convenience in carrying of the portable communication terminal by building in a small sized antenna in a case for an operation entry device such as a mouse known as an operation means. SOLUTION: A track ball or the like and a circularly polarized wave antenna 1 are built in the inside of a position entry device 2 and they are connected to the portable communication terminal main body 3 with a cable 5. An antenna support mechanism 4 is provided to a tip of a cover of the portable communication terminal main body 3 at a highest position when the cover with a display section is open so that the directivity of the circularly polarized wave antenna 1 has excellent reception sensitivity in the satellite communication in its direction by means of a table having an angle adjustment mechanism and the mechanism 4 has an angle adjustment mechanism to fix a turning mechanism at a desired position and support the position entry device 2 placed on itself as horizontal as possible. Thus, the circularly polarized wave antenna 1 and the position entry device 2 being ancillary devices to the portable communication terminal main body 3 are equipped with one and same case so as to realize convenience in carrying.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile terminal for performing data communication including telephone communication, and relates to the field of mobile communication, satellite, especially mobile communication using a low earth orbit satellite.

[0002]

2. Description of the Related Art Conventionally, there has been known a portable communication terminal in which a portable computer having a card type communication modem is contained in an attach case and an antenna is incorporated in a lid of the attach case to perform wireless data communication. . However, in such a mobile communication terminal, it is necessary to adjust the angle of the large lid of the attache case to select the directivity of the antenna.

[0003]

According to the present invention, a small antenna is built in the case of an operation input device such as a mouse, which is known as an operation means of a personal computer, so that it can be more conveniently carried.

[0004]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention is a portable communication terminal for performing wireless data communication using a portable computer having a built-in communication modem, and an operation input device connected to the portable computer by a cable. An antenna is provided, and the antenna is connected to the communication modem in the portable computer through the cable.

For example, in a mobile communication terminal used for mobile satellite communication, a position input device attached to the main body is connected to the main body by a cable, and a rotary encoder device and a circular polarization for satellite communication are provided in the attached device. A position input device having a structure in which a high frequency amplifier is attached in the immediate vicinity of the wave antenna and the circularly polarized wave antenna is provided. A position input device that normally has a rotary encoder device is called a mouse or a trackball. In addition, the mobile communication terminal includes a metal or non-metal fixing mechanism that fixes or holds the position input device on the outside of the housing. This fixing mechanism is installed at the highest position of the mobile communication terminal so that the position input device incorporating the circularly polarized wave antenna can exert its antenna performance. The circularly polarized antenna is horizontal when the position input device is attached to the fixing mechanism of the mobile communication terminal. When the horizontal polarization antenna is built in the position input device, the fixing mechanism has a horizontal plane,
A position input device is attached to this horizontal surface.

The communication modem is, for example, a baseband signal processing unit, a modulation / demodulation unit, a frequency conversion unit, a high frequency amplification unit, and these control units can be integrated as a card type communication modem and built in a portable communication terminal body. However, a part thereof may be separately provided and incorporated in the position input device together with the circular polarization antenna.

For example, a high-frequency amplifier for supplementing the antenna performance of a position input device having a circularly polarized wave antenna incorporated in a mobile communication terminal is connected in the immediate vicinity of the circularly polarized wave antenna and built in the position input device.

For example, a frequency converter for converting a radio wave received at a mobile communication terminal into a low frequency and a circular wave antenna are both incorporated in a position input device.

The above is the embodiment for satellite communication.
Not limited to this, various embodiments are possible based on the scope of claims.

[0010]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram of an embodiment of the present invention, in which 1 is a circular polarization antenna, 2 is a position input device, 3 is a mobile communication terminal body (portable computer), and 4 is an antenna holding mechanism (with an angle adjusting mechanism). Table) 5 is a cable.

The position input device 2 has a built-in position input structure such as a trackball, a built-in circularly polarized antenna 1, and is connected to a portable communication terminal body 3 by a cable 5. The antenna holding mechanism 4 is a table with an angle adjusting mechanism, and the display unit is arranged so that the directivity of the circularly polarized antenna 1 is such that good reception sensitivity can be obtained in performing satellite communication and good reception sensitivity can be obtained. Positioned at the tip of the lid of the mobile communication terminal main body 3 which is at the highest position with the lid open, and having a known angle adjusting mechanism for fixing the rotating mechanism at a desired position. The input device 2 is held so as to be kept as horizontal as possible.

Therefore, the mobile communication terminal body 3
The circularly polarized antenna 1 attached to the and the position input device 2 can be realized in the same case, which is convenient for carrying. Further, the receiving sensitivity can be improved by placing the received signal amplifying amplifier in the vicinity of the circularly polarized wave antenna 1.

[0013]

The present invention is small and convenient to carry. Since the antenna is small and the antenna can be easily adjusted, the receiving sensitivity can be easily improved.

[Brief description of the drawings]

FIG. 1 is a perspective view of a mobile communication terminal in which a part of a position input device is cut away to show an embodiment of the present invention.

[Explanation of Codes] 1: Circularly polarized antenna 2: Position input device 3: Portable terminal body (portable computer) 4: Antenna holding mechanism

Claims (3)

[Claims] 1. A portable communication terminal for performing wireless data communication using a portable computer having a built-in communication modem, wherein an operation input device connected to the portable computer by a cable has an antenna. A portable communication terminal, wherein an antenna is connected to a communication modem in the portable computer through the cable. 2. The antenna is a circularly polarized antenna,
The mobile communication terminal according to claim 1, wherein the mobile communication terminal performs wireless communication with a satellite. 3. The mobile communication terminal according to claim 1, wherein the portable computer is provided with a mounting portion for holding the operation input device.