KR100323612B1 - Angle controllable sleeve antenna for protecting the human body - Google Patents

Abstract

The present invention relates to an angle adjustable sleeve antenna for human protection. In a hand terminal 10, such as a mobile phone or a portable terminal, having a handset 1, a number input section 2, a talker 3, and an antenna port 4, a hinge 11 is provided. A coaxial line 6 connected to the ground via a coaxial line 6 and connected to the antenna port 4 through a variable coaxial cable 5 which is flexibly bent; A sleeve (7) for receiving one end of the coaxial line (6) in a state in which the entire length from the hinge (11) is equal to the length (L) of the hand terminal (10) terminal; And the main direction of the radiation pattern can be freely adjusted in a certain angle range with the terminal body surface to maintain the vertical contact surface with the human body to minimize the influence of electromagnetic waves, and can be inserted into and removed from the sleeve (7), if necessary Accordingly, when folded down to the lower end, the antenna 8 has a minimum attenuation of electromagnetic wave energy exposure. Therefore, by using a remote angle adjustable body protection sleeve antenna to insert a feeder (coaxial) of the same coaxial line as the length of the terminal, install a sleeve to help the radiation, and to prevent the antenna and the antenna parallel to the human body The angle can be arbitrarily adjusted so as to be perpendicular to and the electromagnetic energy on the human body can be reduced.

Description

Angle controllable sleeve antenna for protecting the human body}

The present invention relates to an angle-adjustable sleeve antenna for protecting the human body, and in particular, in the antenna technology field, the portable terminal field, and the mobile communication field, the antenna of the portable terminal is far from the human body, and the main direction of the radiation pattern is perpendicular to the human body. The present invention relates to an angle-adjustable sleeve antenna for protecting the human body so that the effect of electromagnetic waves is minimized to the human body.

In general, the conventional portable terminal antenna has a monopole shape in the upper right center of the terminal body, so that the user's head and the antenna are parallel when used, and the distance between the antenna and the human body is only about 2 cm. Only strong electromagnetic energy is irradiated to the human body.

However, in the case of a conventional mobile phone or a portable terminal, since a monopole antenna is directly connected to the terminal, it is very close to the receiver and is kept only about 2 cm away from the body. In the case of a strong electromagnetic wave, the penetration degree of a child is very large compared to an adult, so there is a problem that it may be sufficiently harmful to a human body.

The present invention has been proposed to solve the above problems of the prior art, an object of the present invention is to have a coaxial line such as the length of the terminal to the radiator portion of the antenna in order to increase the distance between the radiator of the antenna and the human body Insert the feeder and install the sleeve to help the radiation, and to prevent the antenna from being parallel to the human body, the angle can be arbitrarily adjusted so that the antenna is perpendicular to the human body, even when the antenna is folded The antenna should be far from the eyes and the head, which is the weak part of the human body, and have a structure perpendicular to the head, so that the antenna of the portable terminal is farthest from the human body, and the main direction of the radiation pattern is perpendicular to the human body. Adjustable sleeve for body protection to ensure minimal impact on human body It provides an antenna.

1 shows the structure of a remote angle adjustable human protective sleeve antenna with (a) the antenna and the sleeve (sleeve) 90 ° to the left rear of the terminal, and (b) the antenna and the sleeve with the antenna and the sleeve 90 ° to the rear of the terminal. Side view to freely adjust the angle of the sleeve antenna from the side of the open side, and (c) Side view showing the folding of the sleeve when the antenna is fully folded, the terminal attached to the body and the antenna pushed into the sleeve.

Figure 2 is a configuration diagram showing the connection to the coaxial line, the sleeve and the antenna, the feeder (Feeder) made of a metal cylinder in the form of a pipe.

(A) and (b) of FIG. 3 are a side view and a front view of a person showing a radiation pattern when a person uses the terminal, and (c) shows damages to others in a crowded area such as a subway. Front view of folding the sleeve to minimize the influence of electromagnetic waves and removing only the antenna to the bottom of the jaw.

Explanation of symbols on the main parts of the drawings

1: Earphone 2: Number input unit

3: Microphone 4: Antenna port

5: Flexible Coaxiable Cable

6: coaxial line 7: sleeve

8 antenna 9 battery

10: Hand Terminal 11: Hinge

12: Ground

In order to achieve the above object, the present invention provides a hand terminal such as a mobile phone or a portable terminal equipped with an earphone 1, a number input unit 2, a microphone 3, and an antenna port 4. (10), the antenna port (1) through one end of the flexible coax cable (5) which is connected to the ground through a hinge (11) rotatably and treated to bend flexibly A coaxial line 6 connected to 4); A sleeve (7) for receiving one end of the coaxial line (6) in a state in which the entire length from the hinge (11) is equal to the length (L) of the hand terminal (10) terminal; And the main direction of the radiation pattern can be freely adjusted in a certain angle range with the terminal body surface to minimize the influence of electromagnetic waves by maintaining a vertical contact surface with the human body, and can be inserted into and removed from the sleeve (7) If necessary, when folded down to the lower end to provide an angle adjustable sleeve antenna for human body protection, characterized in that consisting of an antenna (8) to minimize the exposure of electromagnetic energy.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention. 1 shows the structure of a remote angle adjustable human protective sleeve antenna with (a) the antenna and the sleeve (sleeve) 90 ° to the left rear of the terminal, and (b) the antenna and the sleeve 90 ° to the rear of the terminal. The side view showing the angle of the sleeve antenna can be freely adjusted from the side of the open side, and (c) the side view showing the state of folding the sleeve and attaching the terminal to the body and pushing the antenna into the sleeve when the antenna is completely folded.

Referring to FIG. 1, in (a), a portable terminal is softly short enough to be folded mechanically on a transmission line of a remotely adjustable human protective antenna terminal (eg, a thin coaxial line, a variable microstrip, a variable coplanar). , Variable slots, etc.), and the opposite side is connected to a feeding coaxial line 6.

The transmission line has the same characteristic impedance as the feeding coaxial line so that transmission loss does not occur as much as possible. The length of the coaxial line 6 is equal to the length of the terminal, and the length of the sleeve 7 and the antenna 8 is λ / 4 (λ: one wavelength length of radio waves).

Since the antenna 8 should be inserted into and removed from the inner core of the coaxial line 6, the inner core of the coaxial line 6, which is a feeder, has a pipe shape of about 1 mm in inner diameter. The dielectric may be filled between the inner core and the outer shell of the coaxial line 6, but the length of the inner diameter of the outer shell varies according to the dielectric constant (ε _r ), so that the impedance of the sleeve antenna is 65Ω-70Ω, so that it is appropriate. In addition, since the sleeve (Sleeve) to be attached to the outside, in consideration of the overall thickness, filling the dielectric, such as Teflon, or maintaining only the ring-shaped support structure may be a dielectric constant of 1 can be.

In this case, the impedance Z ₀ of the coaxial line 6 is defined as an inner outer radius a, an outer inner radius b, a sleeve radius c, and one wavelength length λ of radio waves. It is expressed as Equation 1 below.

If Z _o = 65Ω Therefore, b = 3a for ε _r = 1 and b = 5a for ε _r = 2.3.

On the other hand, there is no special formula in the inner diameter of the sleeve (7), but is generally used as c = 3b, but in practice it should be less than 1cm in consideration of weight and aesthetics (eg a = 0.5mm, b = 1.5 mm, c = 3 mm).

The outer sleeve of the sleeve 7 and the coaxial line 6 must be connected at the end of the coaxial line 6. Figure 1 (b) is a view of the antenna 8 and the sleeve (sleeve) 7 in a side view in a state of being opened at 90 degrees to the rear of the terminal and is used as shown in (b) of FIG. At this time, the radiation pattern of the antenna 8 is the smallest in the user direction and the vertical direction of the antenna 8 is the largest.

Referring to FIG. 2, both the inner and outer lines of the coaxial line 6 and the sleeve 7, which are feeders, and the antenna 8, are made of a metal cylinder in the form of a pipe, and the sleeve 7 is coaxial. It is connected at the end of the line shell and coaxial line. The length of the antenna 8 and the sleeve 7 is λ / 4, and the length of the coaxial line 6 includes a portion covered with the sleeve 7. )

Referring to FIG. 3, (a) and (b) show a side view and a front view of a person showing a radiation pattern form when a person uses the terminal, and (c) shows others in a crowded area such as a subway. This is a front view when the sleeve 7 is folded and only the antenna 8 is pulled out to the lower part of the jaw in order to minimize the influence of electromagnetic waves without damaging the electromagnetic wave.

The figure is a diagram for explaining the electromagnetic wave intensity, and is a reference diagram for indicating the strength of the electric field and the magnetic field at a point r apart from the antenna and the human body when a micro dipole is given.

Equations (2) and (3) , , Is the unit vector in each direction and k is the traveling phase per unit length, where k = 2π / λ.

In the case of the electric field, when the distance r is smaller than λ / 2π, the strength of the near field is greatly increased, which increases the effect on the human body. In fact, the frequency of 1GHz is λ = 30cm and λ / 2π = 4.78cm, so the effect of near field is very large for the existing antenna having a distance of only 2cm from the human body.

On the other hand, the complex power density (Complex Pointing Power Density) received by the human body is represented by the following Equation (4), it can be seen that the effect of the human body is very serious when the distance between the antenna and the human body r <λ / 2π. Therefore, it is important that the human body is not in the near field as much as possible.

Also, even if it is not near field, the power density decreases in inverse proportion to the square of the distance r, so the distance is very important. In the equation (4), since the angle, that is, sin0 = 0, the power density is theoretically 0 It can eliminate the influence of the human body.

In practice, however, the antenna pattern is not theoretically zero, so it is not zero, but the effect can actually be reduced by more than 10 dB.

Therefore, when the above results are summed up, the distance between the antenna and the human body is 2 cm in the conventional case and in the direction parallel to the human body. Compared to the case where the angle between the antenna and the antenna is made vertical, the power density on the human body can be reduced to 30dB or more in total, more than 20dB in distance and 10dB or more in the direction.

To summarize the configuration and operation of the present invention, the conventional portable terminal antenna has a monopole shape in the upper right center of the terminal body, so that the user's head and the antenna are parallel and the distance between the antenna and the human body is only small. Since only 2 cm or so, strong electromagnetic energy is irradiated to the human body in the main direction, so as to solve the problem, up to the radiator portion of the antenna 8 to distance the distance between the radiator and the human body. Insert the feeder of coaxial line with the same length as the terminal and install the sleeve 7 to help the radiation, and keep the distance between the antenna and the human body from 2cm to 12cm or more. Can be attenuated.

In addition, the angle of the antenna can be arbitrarily adjusted so that the antenna is perpendicular to the human body in order to prevent the human body from being parallel to the antenna, thereby reducing the electromagnetic wave energy by 10 dB or more.

Therefore, as a whole, it is possible to reduce the electromagnetic wave energy to the human body compared to the conventional antenna more than 30dB, and when the antenna is folded and used as shown in FIG. 3 (c), the antenna 8 is far from the eyes and the head of the weak part of the human body. It has a structure perpendicular to the head portion can significantly reduce the effect of electromagnetic waves on the human body.

As described above, the angle-adjustable sleeve antenna for protecting the human body according to the present invention uses a feeder with a coaxial line equal to the length of the terminal to the radiator portion of the antenna to increase the distance between the antenna radiator and the human body. And by installing a sleeve to help the radiation, by this method the distance between the antenna and the human body can be attenuated by more than 20dB electromagnetic wave energy by preventing the distance between the antenna and the human body to more than 12cm, preventing the human body and the antenna parallel In order to reduce the electromagnetic wave energy by more than 10dB by allowing the angle to be arbitrarily adjusted so that the antenna is perpendicular to the human body, it is possible to reduce the electromagnetic wave energy on the human body as compared to conventional antennas more than 30dB.

In addition, even when the antenna is folded, the antenna should be far from the eyes and the head, which is the weak part of the human body, and have a structure perpendicular to the head, which can substantially reduce the effect of electromagnetic waves on the human body. There is an effect that can reduce the mental damage caused.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims (1)

In a hand terminal 10 such as a mobile phone or a portable terminal having an earphone 1, a number input unit 2, a microphone 3 and an antenna port 4, A coaxial line connected to the antenna port 4 through a flexible coaxible cable 5, one end of which is pivotally connected to the ground via a hinge 11 and processed to bend flexibly. 6); A sleeve (7) for receiving one end of the coaxial line (6) in a state in which the entire length from the hinge (11) is equal to the length (L) of the hand terminal (10) terminal; And The main direction of the radiation pattern can be adjusted freely in a certain angle range with the terminal body surface to minimize the influence of electromagnetic waves by keeping the contact surface with the human body perpendicular to, and can be inserted into and removed from the sleeve (7), Adjustable angle sleeve antenna for human body protection, characterized in that consisting of an antenna (8) is reduced to the minimum exposure to electromagnetic energy when used folded down.