JP2000059841A - Portable radio terminal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a foldable container structure for an antenna pole of the portable radio terminal. SOLUTION: The portable radio terminal consists of an antenna pole 22 that incorporates an antenna, a joint means formed with a recessed part that houses part or nearly all of the antenna pole 22 and a radio terminal main body 21 that has a radio transmission/reception circuit that feeds power to the antenna, and the joint means is provided with a support shaft that pivotally supports one end to the radio terminal main body 21 and with a support shaft that pivotally supports a lower end of the antenna pole 22, and the antenna pole 22 and the joint means are turned to contain the antenna pole 22 to the recessed part of the joint means and the joint means has a state that is folded in the vicinity of the radio terminal main body 21 and an extraction state of releasing the folded state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable radio terminal having a foldable antenna pole.

[0002]

2. Description of the Related Art In recent years, many portable radio terminals which have been developed and are becoming smaller and lighter in weight have been designed so that an antenna can be housed in a telephone body and pulled out. Generally, in these antennas, a linear radiating element is spirally wound around a resin rod having a diameter of 1 to 2 mm, and a resin cover is coated from above the wound.

[0003]

Since the above-mentioned portable radio terminal performs radio communication with a terrestrial radio base station, it is sufficient that the antenna gain be obtained in the horizontal direction. On the other hand, in the future, in a mobile phone using a satellite from which service is started, it is necessary that the antenna gain be obtained at least at the zenith (vertical direction), and more desirably at all directions in the sky. The present applicant has proposed a portable wireless terminal antenna capable of performing such satellite communication in Japanese Patent Application No. 10-135083.

FIG. 2 is a diagram showing an antenna disclosed in Japanese Patent Application No. Hei 10-135083, which constitutes a circularly polarized antenna used in satellite communications. The microstrip planar antenna 1 has a patch-shaped radiating element 1b on one surface of a dielectric substrate 1c and a ground plate 1d on the opposite surface in parallel with the radiating element 1b.
Further, a feeding pin 1a is provided on a diagonal line deviated from the center of the radiating element 1b, and is passed through a through-hole opened from the back surface of the ground plate 1d and the dielectric substrate 1c. Further, the center conductor of the coaxial line 6 is connected to the power supply pin 1a from the back surface, and the outer conductor of the coaxial line is connected to the ground plate 1d. Reference numeral 5 denotes a feeding point. Reference numeral 15 denotes a connector connected to a transmission / reception circuit in the wireless terminal. In the configuration of the microstrip planar antenna 1 described above, the obtained antenna gain is only in the vertical direction. In view of this, Japanese Patent Application No. 10-135083 of FIG. 2 discloses a method of obtaining an antenna gain not only in the vertical direction but also in all directions by providing a dielectric support tube 4 of substantially the same size under the microstrip planar antenna 1 and surrounding the same. A plurality of planar radiating elements 3 are attached at substantially equal intervals to each
Connected to. 2 is a plan view of each planar radiating element 3
d is a wire that is electrically connected to d. With this configuration, a gain in the horizontal direction can be obtained, and as a result, an antenna gain can be obtained in all directions. Therefore, the antenna and the coaxial cable 6 are both held in a resin antenna pole, and are mounted in the portable wireless terminal so that they can be stored and pulled out, so that the antenna can be vertically mounted on the portable wireless terminal regardless of the direction of the satellite. It is possible to communicate with a satellite in an arbitrary direction as it is pulled out. In this example, a conductor cylinder 13a is put on the coaxial line 6, the upper side is opened, and the lower end 13b is connected to the outer conductor of the coaxial line 6 to be short-circuited to form a supertop (Spertopf: blocking tube) 13 formed. I have.
Further, linear radiating elements 12 are alternately arranged with the planar radiating elements 3 as radiating elements for the purpose of further gain in the horizontal direction. One end of the linear radiating element 12 is a ground plate 1d.
And the other end is connected to the super top 13.

FIG. 3 is a side view of the portable wireless terminal 100 holding the antenna shown in FIG. 2 in an antenna pole and imagining a stored state and a pulled-out state with respect to the portable wireless terminal. However, in the above example, in order to hold the planar antenna at the tip of the antenna pole and to incorporate a coaxial line, the antenna pole must be thicker than the conventional one due to its strength, resulting in a heavy weight. There is difficulty in durability such as scratches on the sliding surface. In the example shown in FIG. 3, in particular, the coaxial line storage section 102 below the thick antenna storage section 101 among the antenna poles is relatively thin, and can be stored in the housing of the portable wireless terminal 100 assuming a diameter of about 3 to 4 mm. However, the coaxial cable storage section 102 is made even thicker (for example, φ10 m
m), it is necessary to accommodate a larger antenna guide pipe or the like in the housing of the terminal 100 in order to store the thick antenna pole 102 in the housing of the portable wireless terminal 100, which is disadvantageous in terms of space. It is difficult to reduce the size of the portable wireless terminal. Instead of the omnidirectional antenna shown in FIG. 2, a microstrip planar antenna 1 having a normal configuration without a radiating element for gain in the horizontal direction below a ground plate is mounted on an antenna pole and used for a portable radio terminal. In such a case, it is necessary to provide an antenna angle adjusting mechanism for rotating and supporting the antenna pole in an arbitrary satellite direction.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems of the prior art, the present invention provides an antenna pole having a built-in antenna and a recess for accommodating a part or substantially all of the antenna pole in a longitudinal direction. And a wireless terminal body having a wireless transmitting / receiving circuit for feeding power to the antenna, wherein the joint means includes a support shaft rotatably supporting one end of the wireless terminal body and the antenna pole at the other end. A supporting shaft rotatably supporting the lower end, and by rotating the antenna pole and the coupling means, the antenna pole is housed in the coupling means recess, and the coupling means is folded near the wireless terminal body. And a pulled-out state in which the folded state is released.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a diagram of a portable radio terminal showing one embodiment of the present invention, wherein (a) shows a state when the antenna is pulled out, and (b) shows a state when the antenna is folded. (C) is a sectional view of a U-shaped joint used for a portable wireless terminal. The portable wireless terminal main body 21 has a built-in circuit board on which components such as a wireless transmission / reception circuit (not shown) are mounted, and further has a battery, a microphone, a speaker, a key operation unit, a display unit, and the like on the front.

Reference numeral 22 denotes an antenna pole. The above-mentioned microstrip planar antenna has a patch-shaped radiating element directed upward to a coaxial line receiving portion 22a having a diameter of 10 mm and an antenna receiving portion 22b having a larger diameter at the tip thereof. It is built in the order of the ground plate. Feed pins arranged on a diagonal line deviated from the center of the radiating element penetrate through holes provided in the ground plate and the dielectric substrate, and the center conductor of the coaxial line is connected from the bottom side, and the outer conductor of the coaxial line Are connected to the ground plate. Coaxial line is coaxial line storage part 22a
Through.

Reference numeral 23 denotes a U-shaped joint, the cross section of which is shown in FIG. 1C. The shape of the U-shaped recess 24 is such that the coaxial cable housing 22a fits tightly without any gap. In addition, the U-shaped joint 23 has a length that accommodates most of the coaxial wire storage portion 22a in the longitudinal direction. When a coaxial cable drawn from the lower end of the coaxial cable housing portion 22a is drawn into the recess 24 of the U-shaped joint 23, and the lower end is fitted into the recess 24 at one end of the U-shaped joint 23 and connected with the support shaft 25, the antenna Paul 2
2 is rotatably supported by the U-shaped joint 23. Further, since the lower end of the coaxial line housing portion 22a is pressed against the inner wall of the recess 24, the coaxial line housing portion 22a rotates against the pressing force and stops at an arbitrary angle. Dent 24
Is positioned and held by the press-contact holding.

The portable radio terminal main body 21 is provided with an antenna accommodating portion 26 on a side surface, which is a U-shaped recess on a side surface (not shown) of the terminal main body 21. The U-shaped joint 23 is rotatably supported by the support shaft 27 at the upper end of the recess. In addition, an opening or a connector for guiding the coaxial line from the antenna to the wireless transmission / reception unit in the terminal main body 21 via the coaxial line storage section 22a and the U-shaped joint 23 is provided in the recess. The recess of the antenna housing 26 and the U-shaped joint 23 are configured in the same manner as the relationship between the U-shaped joint 23 and the coaxial cable housing 22a, and the U-shaped joint 23 rotates at an arbitrary angle with respect to the terminal body 21. It is held at the angle at which the rotation has been stopped.

With this configuration, when the antenna pole is folded, the entire length of the U-shaped joint 23 is stored in the recess of the side storage section 26 of the portable radio terminal main body 21 as shown in FIG.
Further, the U-shaped joint 23 is in a state in which most of the coaxial cable storage portion 22a is stored from the lower end of the antenna pole 22. When the antenna pole 22 is pulled out from the folded state, the U-shaped joint 23 and the antenna pole 22 can be positioned and fixed at an arbitrary angle as shown in FIG. Therefore, the microstrip planar antenna at the tip can be oriented in any direction. It should be noted that the joint is made of a material having high flexibility, so that an improvement in impact resistance can be expected.

[0012]

According to the present invention, the antenna can be compactly folded outside without storing the antenna in the portable radio terminal body. There is no sliding part as in the prior art, and the durability is increased. In particular, regarding the communication between the portable wireless terminal on the ground and the satellite, when the flat antenna is held at the tip of the antenna pole on the portable terminal side and the feeder wire is passed through the antenna pole, the antenna pole is thick and housed in the mobile terminal. Since the present invention makes it difficult to use the present invention, the antenna pole can be stored compactly, and the antenna can be pulled out to any angle, so that radio communication with the satellite can be performed without using a special antenna having an antenna gain in all directions. Can be performed well.

[Brief description of the drawings]

FIGS. 1A and 1B are diagrams of a portable wireless terminal illustrating an embodiment of the present invention, in which FIG. 1A illustrates a state when an antenna is pulled out, FIG. 1B illustrates a state when the antenna is folded, and FIG. Sectional drawing of the U-shaped joint used for a radio | wireless terminal.

FIG. 2 is a diagram showing a conventional antenna.

FIG. 3 is a diagram showing a conventional portable wireless terminal.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Portable radio | wireless terminal main body 22 Antenna pole 22a Coaxial wire accommodating part 22b Antenna accommodating part 23 U-shaped joint 24 Depression 25, 27 Support shaft 26 Terminal accommodating recess of terminal main body

Claims (2)

[Claims] A wireless terminal having an antenna pole having a built-in antenna, coupling means formed with a recess for accommodating a part or substantially all of the antenna pole in a longitudinal direction, and a radio transmitting / receiving circuit for feeding power to the antenna. Wherein the coupling means comprises a support shaft rotatably supporting one end to the wireless terminal body and a support shaft rotatably supporting the lower end of the antenna pole at the other end. By rotating the joint means, the antenna means is housed in the joint means recess and the joint means is folded in the vicinity of the wireless terminal main body, and the folded state is released and the drawn state is provided. Characteristic portable wireless terminal. 2. The antenna according to claim 1, wherein the antenna is a planar antenna, and the antenna radiating element is held at the tip of the antenna pole so that the antenna radiating element is on the upper surface. A portable wireless terminal connected to a wireless transmission / reception circuit of a wireless terminal body.