JPH05335826A - Built-in antenna for communication equipment - Google Patents

Abstract

PURPOSE: To make it unnecessary to add a capacity for building in an antenna with respect to a communication equipment small in size. CONSTITUTION: This is a radio communication equipment equipped with a display terminal including a glass part 102 and antennas 108 and 110 formed on it. Also, this radio communication equipment includes a metallic frame functioning as an antenna for fixing the display terminal on the radio communication equipment. As a result, any additional space for an individually connected antenna is unnecessitated and a radio frequency signal is received by using the antennas 108 and 110.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates generally to antennas, and more particularly to built-in antennas for communication devices.

[0002]

2. Description of the Prior Art Antennas for portable communication devices are either internal or external. In the external case, a dipole antenna or a loop antenna is externally connected to the communication device via an antenna coupler, which provides a means for receiving radio frequency signals. However, in the case of the internal type, the antenna is generally printed on a printed circuit board or is contained in the housing as a conductive element. Conventional built-in antennas are typically housed in a cavity that is surrounded by the housing or case of the communication device.
Using the internal antenna is aesthetically favored over the external antenna. However, these antennas require additional housing volume. As the size of communication devices shrinks, it is not desirable to add another volume to accommodate the antenna. External antennas are aesthetically unpleasant, and internal antennas require valuable internal radio space, thus requiring antennas that overcome the shortcomings of the prior art.

[0003]

A wireless communication device having a display terminal is provided. This display terminal includes a glass part in which an antenna is arranged. The wireless communication device also includes a receiver that receives a wireless communication signal. The wireless communication signal is coupled to the receiver via the antenna. In another example of the invention, a wireless communication device includes a metal frame that acts as an antenna and secures a display terminal to the communication device.

[0004]

DESCRIPTION OF THE PREFERRED EMBODIMENT Referring to FIG. 1, a display 10 in accordance with the principles of the present invention, preferably a liquid crystal display (LCD).
0 is shown. The display 100 includes a glass 10 including an active portion 104 capable of writing data.
Have two. A connector 106 is provided for coupling the display 100 to other elements of the electronic device, the display 100 being part of the electronic device. Antennas 108, 110 are printed on the glass 102 in the area outside the active display area 104. The antennas 108, 110 can be printed on the glass 102 using known techniques, including thick film technology. Antenna 108,1
The combination of 10 performs diversity when receiving electromagnetic waves of variable polarity. The antenna 108 functions optimally when receiving electromagnetic waves of vertical polarity. Horizontally polarized electromagnetic waves are efficiently received by the antenna 110. Although utilizing diversity antennas improves reception, it is clear that it is not necessary. The presentation of the combination of two antennas 108, 110 is for the purpose of illustrating the diversity of the present invention and should not be construed as limiting the present invention.
Therefore, the antennas 108 and 110 are connected to the display 100.
They can be incorporated individually or in combination. The radio frequency signals are received by the antennas 108, 110, input to suitable circuitry and further processed. In general, the housing of the electronic device that makes up display 100 includes an inner layer of metal surface that provides a shield for display 100. This shield, which faces the back of the glass 102, is utilized by the antennas 108, 110 as an additional gain. The combination is a feed, which is well known in the art.
Feed through method or clamp through (cla
mp through) method.

FIG. 2 shows another embodiment of the present invention. The display 200 includes a plurality of electronic components 208A-.
A printed circuit board 202 constituted by 208D;
Display 204 is shown to be included. The electronic components 208A-208D are preferably drivers and peripheral circuits that drive the display 204. The frame 206, which is preferably metal, displays the display 204.
Used to secure the printed circuit board 202 to the printed circuit board 202.
The clamps 210A, 210B are used alone or in combination with other clamps (not shown) to secure the glass 204 to the printed circuit board 202. The electrical connection between the glass 204 and the printed circuit board 202 is
This can be done via any available mullet-pin connection or elastomer. In this example, the frame 206 is used as an antenna. The radio frequency signal is received by the frame, coupled to a receiving circuit and decoded. The coupling between the frame 206 and the receiving circuit can be done via spring-loaded contacts that can be built into both the frame and the receiver. The frame 206 can be interrupted at the appropriate location to obtain the desired antenna performance at various frequencies.

In general, an antenna structure for a communication device having a display terminal is shown. The preferred embodiment of the present invention is
Utilizes inactive glass area. The antennas 108, without the need for additional space for individually coupled antennas,
110 may be utilized to receive radio frequency signals. To form the antennas 108 and 110, a metal film is printed, paste, and the like on the display 100.
It can be sputtered or plated. Plating can be done by sputtering and then photodefining a pattern on the glass 102.

FIG. 3 shows a flip top type communication device for further explaining the principle of the present invention.
The communication device 300 includes a display unit 302 and a keyboard unit 304. The display unit 302 includes a display 110 having associated antennas 108, 110.
including. How flip-top design has been utilized to reduce the overall volume of the device 300 is seen. In this miniaturization, the advantages of the present invention can be seen. In the present invention, the device 300 as a small handheld product without losing the ability to efficiently receive communication signals.
The integrity of can be maintained.

Referring to FIG. 4, a block diagram of a communication device 300 according to the principles of the present invention is shown. Communication device 300 includes receiver 408 coupled to antenna 206 via antenna coupler 412. The radio frequency signal received by the antenna 206 is received by the receiver 40 via the antenna combiner 412.
8 inputs. The received radio frequency signal is recovered by the receiver 408, coupled to the controller and output appropriately. The data message is decoded by controller 404 and stored or displayed on display 100. The voice message is
It is coupled to the speaker 414 via the audio circuit block 410. The audio circuit block 410 outputs audio to the speaker 4
14 includes an audio gating circuit that controls gating. Gating of the audio circuit is controlled by the controller 404. The information entered at the keyboard is coupled to the controller 404 and processed appropriately. Note that the antenna 206 and the display 200 are operationally different so that they are not included as one block. Although these mechanical attachments imply a unitary construction, the electrical couplings are quite different and thus do not operatively interfere with each other.

FIG. 5 shows an expected antenna pattern chart 502 in the vertical plane of the antenna of the present invention. The pattern 502 is relatively symmetrical and is substantially above the horizontal pattern. The top view of the device 300 is shown by the arrow 50.
It is shown along the line-of-sight direction indicated by 4.

Other embodiments may utilize the same general principles to achieve similar results without departing too much from the spirit of the invention. That is, a loop antenna can be formed by printing a part of the loop on the glass 102 and forming the remaining part of the loop around the inner wall of the display unit 302. Other antennas can be printed entirely on the glass 102.
The actual antenna, whether printed, plated or framed, will vary depending on the particular geometry of device 300 and its operating frequency.

Miniaturization of electronic devices has always been a major goal of designers. In recent years, the miniaturization of electronic components that enable the operation of these electronic devices has greatly advanced. As the miniaturization progresses in this way, some communication devices have been downsized to the size of a credit card. Conventional antennas, whether built-in or external, can barely meet the stringent dimensional requirements of such devices. But,
The antennas 108, 11 described according to the principle of the present invention
0,206 is ideal for such applications. An important advantage of the present invention is that the appearance of the communication device need not be sacrificed to achieve performance.

It will be appreciated by those skilled in the art that various modifications and variations can be made to the invention described above without departing from the scope of the invention. Therefore, the scope of the claims should not be construed as limited to the particular embodiments, and
There is no specific limitation explicitly including such an embodiment.

[Brief description of drawings]

FIG. 1 shows a glass display terminal according to the present invention.

FIG. 2 shows a glass display terminal having a metal frame according to the present invention.

FIG. 3 is an isometric view of a communication device in accordance with the principles of the present invention.

FIG. 4 is a block diagram of a communication device according to the principles of the present invention.

FIG. 5 shows the expected radiation pattern of an antenna according to the invention.

[Explanation of symbols]

 100 display 102 glass 104 active part 106 connector 108,110 antenna 200 display 202 printed circuit board 204 display 206 frame 208A-208D electronic parts 210A, 210B clamp 300 communication device 302 display part 304 keyboard part 404 controller 408 receiver 410 voice circuit block 412 antenna coupler 414 speaker

Claims (10)

[Claims] 1. An electronic device comprising: a display terminal; a receiver for receiving a radio frequency signal; and an antenna arranged on the display terminal for coupling the radio frequency signal to the receiver. .. 2. The electronic device of claim 1, further comprising a ground plane that provides additional gain for the antenna. 3. The electronic device according to claim 1, wherein the display terminal includes a liquid crystal display (LCD). 4. A radio comprising: a display having a glass portion; an antenna disposed on the glass portion of the display; and a receiver coupled to the antenna for receiving wireless communication signals. apparatus. 5. The wireless device of claim 4, wherein the display includes a ground plane. 6. The wireless device of claim 4, wherein the display comprises a liquid crystal display (LCD). 7. The wireless device according to claim 4, wherein the antenna is a loop antenna. 8. A communication device for receiving radio frequency communication signals: a liquid crystal display having a glass portion; at least one loop antenna printed on the glass portion; a metal frame for fixing the display to the device. And a metal frame serving as a return path of the at least one loop antenna; and a receiver coupled to the antenna for receiving the radio frequency communication signal. Communication device. 9. A communication device for receiving radio frequency communication signals, comprising: a display having a glass part; a receiver for receiving the radio communication signals; and coupling the radio communication signals to the receiver, and A communication device comprising a metal frame for mechanically fixing a display to the communication device. 10. A communication device for receiving radio frequency communication signals comprising: a liquid crystal display having a glass portion; at least one loop antenna printed on the glass portion; and the radio frequency signal coupled to the antenna. A communication device comprising: a receiver for receiving a communication signal;