A method of production of an antenna pattern

Method of forming an antenna pattern {A METHOD OF PRODUCTION OF AN ANTENNA PATTERN}

The present invention relates to an antenna as a whole, and more particularly, to a method of forming an antenna pattern.

Today, the market for portable wireless communication devices, such as mobile phones, personal digital assistants (PDAs), portable computers and similar devices, is highly competitive, which puts manufacturers economically at risk. In addition, the antennas of such devices only access a limited space of different aspects multiple times.

As a method of manufacturing a low-cost antenna, there is a method of constructing an antenna pattern with an electrolyte, but this is limited in the selection of a detailed 3D shape (three-dimensional shape) for the antenna pattern. One way to fabricate detailed advanced 3D shapes for antenna patterns is to use inkjet printers, laser-activated devices, or similar devices, but this tends to be expensive to fabricate antennas.

It is an object of the present invention to provide a method of forming an antenna pattern in which the cost of manufacturing the antenna is low.

In particular, the above object according to the present invention is achieved by a method of forming an antenna pattern, an antenna pattern and a portable radio communication device, respectively, as defined by the appended claims.

The cost for forming an antenna pattern created using an inkjet printer, laser activation device, or similar device is highly dependent on the purchase cost of a manufacturing device such as, for example, a laser activation device. Accordingly, a significant reduction in manufacturing cost for fabricating the antenna pattern is achieved, for example, by reducing the cycle time of the laser activating device, which is obtained by not activating a part of the interior of the antenna pattern.

Further features and advantages of the present invention will become apparent from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be more fully understood from the accompanying drawings and detailed description of embodiments given below, which are provided for illustration only and do not limit the present invention.

1A to 1C are schematic views of antenna patterns formed in accordance with the present invention;

Fig. 2 schematically shows a grid pattern of an antenna having a generally rectangular outline;

Fig. 3 is a chart showing the return loss for different grating sizes of the antenna in Fig. 2;

Fig. 4 is a chart showing the total efficiency for different grating sizes of the antenna in Fig. 2;

In the following description for purposes of explanation and not limitation, specific details, such as, for example, specific techniques and applications, are set forth in order to provide a thorough understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In some instances, detailed descriptions of well-known methods and apparatuses are omitted so as not to obscure the description of the present invention in unnecessary detail.

Hereinafter, a preferred embodiment of the present invention will be described with reference to Figs. 1A to 1C.

Antenna patterns for portable radio communication devices such as mobile phones, personal digital assistants (PDAs), portable computers or similar devices are created by means of a laser activation device and subsequent metallization process. Alternatively, the antenna pattern is generated by an inkjet printer or similar device. Preferably, the apparatus for forming the antenna pattern may manufacture a 3D type (stereoscopic) antenna having a via hole.

In this embodiment, it is exemplified that the antenna pattern has a predetermined outline 1, that is, an L-shaped slot 2 and a rectangular outline 1 as a whole. Further, the antenna pattern has one or more feeding points 3 , one or more grounding points 4 , or one or more feeding points 3 and one or more feeding points 4 . The interior of the predetermined contour of the antenna pattern includes a plurality of interior blanks that are not generated by the laser activating device, which reduces the cycle time of the laser activating device while keeping the antenna performance large.

Since the blank portion of the antenna pattern, that is, the blank portion with an empty interior, is not activated by the laser activating device, the cycle time of the laser activating device is shortened. In addition, since the antenna performance is more affected by the voids adjacent to the feed and ground points, the antenna pattern is activated at a higher density adjacent to the respective feed and ground points. The sharp-angled corner portions and portions (not shown) adjacent to the edge portions are more robust than the blank portions of the antenna pattern, thereby improving antenna performance.

A plurality of empty blanks inside the antenna pattern that are not activated by the laser activating device are rectangular in shape with curved corners as shown in FIG. 1B, which is advantageous for the performance and manufacture of the antenna. Alternatively, the plurality of empty spaces inside the antenna pattern may be rectangular with sharp corners as shown in Fig. 1A, circular as shown in Fig. 1C, and also have other shapes such as irregular shapes. have.

Advantageously, an empty portion of the antenna pattern may be used for a separate element to save space inside the portable radio communication device. The present invention has the most advantageous advantage for an antenna with a large connection area, but since the circulation time is greatly reduced by the present invention, it has an advantage also for other antennas having a rim with a small protrusion. It also has structural advantages.

In short, the laser activating device deforms the organometallic compound, so that only the deformed portion is metallized during the subsequent metallization process.

Hereinafter, experiments showing antenna performance for different antenna patterns with different grating sizes are described with reference to FIGS. 2 to 4 .

The return loss and total efficiency for an antenna with an overall rectangular profile were measured. Measurements were performed on three-dimensional antenna patterns having a grid size of 1 mm, a grid size of 2 mm, and a grid size of 4 mm, respectively. Although the center frequency was slightly changed, the bandwidth at -6dB was not significantly affected by the grating size. However, such a frequency change is easily compensated for by matching the antenna. Also, bandwidth was not significantly affected by the total efficiency of the antenna.

It will be appreciated that the present invention may be modified in many ways. Such modifications should not be considered as a departure from the scope of the present invention. All modifications apparent to those skilled in the art are intended to be included within the scope of the invention as defined by the appended claims.