KR20100034489A

KR20100034489A - Combined digital multimedia broadcasting antenna

Info

Publication number: KR20100034489A
Application number: KR1020080093663A
Authority: KR
Inventors: 김선권; 김정
Original assignee: 주식회사 네오펄스
Priority date: 2008-09-24
Filing date: 2008-09-24
Publication date: 2010-04-01

Abstract

PURPOSE: An integrated type DMB(Digital Multimedia Broadcasting) antenna is provided to reduce manufacturing costs by integrating a QHA(Quadrifilar Helical Antenna) for receiving the satellite DMB and a rod antenna for receiving the terrestrial DMB. CONSTITUTION: A QHA comprises an upper plate(25), a lower plate(24), and two pairs of antenna strips(22). Two pairs of antenna strips are arranged between the upper plate and the lower plate. An added electrode(23) is arranged between an antenna strip of each pair. The added electrode electrically interlinks the upper plate and lower plate. The rod antenna(29) is stored inside the QHA through a penetration part of the upper plate of the QHA. The rod antenna includes a bushing(27). The bushing is electrically connected to the signal line.

Description

Integrated DMB antenna {COMBINED DIGITAL MULTIMEDIA BROADCASTING ANTENNA}

The present invention relates to an integrated DMB antenna, and more particularly, to an integrated DMB antenna in which terrestrial DMB antennas and satellite DMB antennas are integrated while maintaining reception performance.

In an effort to integrate additional functions into portable devices, recently introduced portable multimedia devices are being integrated with wireless communication functions and wireless broadcast reception functions. In particular, in the case of a mobile communication terminal, which is indispensable for daily life due to explosive demand, it is capable of receiving and outputting a video call function and a digital multimedia broadcasting (DMB) as well as a voice call by basic mobile communication. It is often included. On the other hand, portable multimedia players, portable game machines, and the like, which are recently in high demand, are not only classified according to their core functions, but also generally have a function of receiving and outputting DMB while basically having a function of playing multimedia.

Therefore, portable devices employing a receiving means and a receiving antenna for receiving the DMB can be easily found in the vicinity.

However, in the case of DMB, since satellite DMB and terrestrial DMB are coexisting with different communication methods, portable devices equipped with the DMB reception function selectively apply one of them, and portable devices supporting them at once are Although experimentally constructed, it has not been put to practical use yet. This is because the inconvenience of having to carry a plurality of antennas is not solved because the reception antennas necessary to support these functions must be individually applied according to the type of reception broadcast.

1 shows an example of a portable device that simultaneously supports terrestrial DMB and satellite DMB broadcast reception. As shown in FIG. 1, the size of the portable device 10 itself is largely different even when the terrestrial DMB and satellite DMB are simultaneously supported. Although not occurring, in the case of an antenna for receiving the corresponding broadcasts, there is a situation in which the terrestrial DMB receiving antenna 11 and the satellite DMB receiving antenna 12 should be provided, respectively.

In particular, in the case of the satellite DMB and the terrestrial DMB, since the use band is different and the reception method of the antenna is also different, the same antenna cannot be used and a plurality of antennas must be separately configured. Therefore, in order to increase the portability of the portable device, an external antenna is mainly applied, and thus, when both the terrestrial DMB and the satellite DMB are supported, the inconvenience of having to carry two antennas respectively occurs.

Therefore, although efforts have been made to integrate such individual antennas, satellite DMB and terrestrial DMB use circular polarization signals and vertical polarization signals in different bands, respectively, so that antenna configurations are different, and interference problems and structures when integrating them are different. Due to the complexity of the poor reception characteristics and high cost, the practical integrated antenna has not emerged.

In view of the above problems and market demands, an object of the present invention is to provide an integrated DMB antenna combining a satellite DMB antenna and a terrestrial DMB antenna to selectively receive terrestrial DMB and satellite DMB. .

Another object of the embodiments of the present invention is easy to mass-produce and reduce reception rate while combining a quadrature quadrature antenna (QHA) for receiving satellite DMB and a multi-stage rod antenna for receiving terrestrial DMB configured to receive a vertically polarized signal. It is to provide an integrated DMB antenna configured with a signal line to prevent it.

Another object of the embodiments of the present invention is to change the structure of the QHA to accommodate the load antenna, and to effectively connect the signal lines to suppress the change in size while receiving terrestrial DMB and satellite DMB selectively It is to provide a DMB antenna.

Another object of the embodiments of the present invention is to provide an integrated DMB antenna that combines a QHA and a load antenna while reducing the length of the load antenna by additionally applying a helical structure to a portion of the load antenna.

In order to achieve the above object, the integrated DMB antenna according to an embodiment of the present invention has a cylindrical antenna body having two pairs of antenna strips between an upper substrate formed with a through portion and a lower substrate including an additional electrode connection pattern. A QHA disposed between the antenna strip and an additional electrode electrically connecting the upper substrate and the lower substrate; And a multistage entry / exit rod antenna provided on the upper substrate to be received inside the QHA through the upper substrate penetrating portion of the QHA and having a bushing electrically connected to the signal line.

The upper substrate of the QHA includes an antenna connection pattern for electrically connecting the antenna strips one by one, a through hole formed at the center of the antenna connection pattern, and a pattern in which the additional electrode is connected and the bushing of the rod antenna is fixed. do.

The lower substrate of the QHA includes a pad pattern to which the antenna strip is connected, a pad pattern to which the additional electrode is connected, and a pad pattern to connect an external antenna signal line to the pad patterns through a matching element.

The additional electrode may be formed in plural in the space between the antenna strips of the QHA or on the rear surface of the cylindrical antenna body in which the antenna strips are formed.

The antenna case may further include an antenna case surrounding the QHA and having a penetration part through which the rod antenna may be pulled in and pulled out.

In addition, the integrated DMB antenna according to another embodiment of the present invention includes a multi-stage load antenna that is pulled in and out; A bushing for guiding the entry and exit of the rod antenna and fixing the lead antenna in and out; An upper substrate having a through part through which the rod antenna is inserted and an installation part of the bushing; A lower substrate configured with an external antenna line connection portion; A cylindrical substrate on which an antenna strip for electrically connecting the upper and lower substrates is formed; And an additional electrode formed between the antenna strips of the cylindrical substrate and electrically connecting the external antenna line connected to the lower substrate and the bushing installation portion of the upper substrate.

The additional electrode may be formed on the rear surface of the cylindrical substrate or a plurality of the additional electrodes.

The helical antenna unit may further include a helical antenna unit capable of receiving and drawing the multistage rod antenna between the multistage rod antenna and the bushing.

Integrated DMB antenna according to an embodiment of the present invention has the effect that can selectively receive the desired DMB broadcast even if using a single antenna by combining the satellite DMB antenna and terrestrial DMB antenna to selectively receive the terrestrial DMB and satellite DMB have.

An integrated DMB antenna according to an embodiment of the present invention is a cylindrical antenna of QHA while combining a quadrature quadrature antenna (QHA) for receiving a circularly polarized signal and a multi-stage rod antenna for receiving a terrestrial DMB configured to receive a vertically polarized signal. By applying an additional electrode to the body portion, there is an effect of minimizing the addition of cost while maximizing mass production ease and preventing a decrease in reception rate.

The integrated DMB antenna according to the embodiment of the present invention can receive the load antenna by changing the structure of the QHA, and can effectively receive the terrestrial DMB and satellite DMB while suppressing the size change by effectively connecting the signal lines. Providing a single antenna has the effect of increasing the versatility of the antenna.

The integrated DMB antenna according to the embodiment of the present invention combines the QHA and the load antenna, and further reduces the length of the load antenna by applying a helical structure to a part of the load antenna, thereby satisfying both the integration and the miniaturization of the antenna. It works.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings.

2 is a perspective view showing the structure of the integrated DMB antenna 20 according to an embodiment of the present invention. As shown in FIG. 2, the QHA antenna and the rod antenna are integrated.

QHA is a pair of antenna strips 22 formed in a spiral and is generally used as a communication and navigation receiver operating in the UHF (Ultra High Frequency), L frequency, and S frequency bands. Resonant QHAs with limited bandwidth are also used to receive Global Positioning System (GPS) signals or satellite DMB. QHA has a relatively small size, good circular polarization coverage and low axial ratio for most upper hemispheres. Since QHA is a resonant antenna, the size of QHA is generally chosen to provide optimal performance at narrow bandwidths. Since QHA was first introduced in 1969 by C.C Kilgus, it has been commercialized in various forms and is widely used as an antenna for satellite DMB reception.

Referring to FIG. 3, two pairs of antenna strips 22 are configured to be electrically connected in pairs by an upper substrate 25 to form fillers having different lengths, and the antenna strips 22 are arranged and have a cylindrical cylinder. The flexible substrate 21 forming the shape has an empty shape.

On the other hand, since the QHA receives a signal only outside the helical antenna strip 22 during operation, there is a space inside the antenna body of the cylindrical cylinder shape that is not used as an antenna.

Therefore, as shown in FIG. 2, the multi-stage rod antenna 29 is accommodated in the space when not in use, thereby maximizing space utilization.

The QHA receiving the satellite DMB signal is an antenna for receiving a circularly polarized signal, and the multi-stage rod antenna 29 for receiving a terrestrial DMB signal is an antenna for receiving a vertically polarized signal. Is stored in the internal space of the QHA does not affect the reception of the QHA, and when the multi-stage rod antenna 29 is drawn out as shown in the figure, the QHA does not affect the reception of the multi-stage rod antenna 29. Do not.

For this integrated configuration, the through substrate for accommodating the multi-stage rod antenna 29 should be formed in the upper substrate 25 of the QHA so as not to affect the function of the QHA, and the external antenna in the lower substrate 24 of the QHA. In addition to the basic electrode pattern connected to the module connector 28 for interfacing the connection with the line, an electrode pattern for connecting the corresponding external antenna line with the multi-stage rod antenna 29 should be added.

Here, the multi-stage rod antenna 29 is provided with a bushing 27 for guiding the antenna when the antenna is pulled in and supporting the antenna when the antenna is pulled out, while providing an electrical connection with the external antenna line when the antenna is pulled out.

Meanwhile, when the QHA and the multistage rod antenna 29 are integrated in this way, the signal line of the external antenna line is connected to the QHA and the multistage rod antenna 29 in order to unify the module connector 28. Here, the configuration for connecting the signal line of the external antenna line to the multi-stage rod antenna 29 should be considered.

For example, when the signal line is disposed outside the cylindrical antenna body of the QHA to connect the lower substrate 24 and the bushing 27 supporting the multi-stage rod antenna 29, the signal line is easily connected but is not used for reception of the QHA. There is a problem that the reception sensitivity is lowered because it affects, and when the signal line is connected to the inside of the QHA and connected to the lower substrate 24 and the bushing 27 of the load antenna, the retracting of the multi-stage load antenna 29 and The signal line is moved according to the drawing operation, so it is physically vulnerable, and the connection is not easy, resulting in a low production yield.

Therefore, in order to solve this problem, in the present embodiment, as shown in Figs. 2 and 3, an external antenna line is connected to the load antenna in an empty space between the antenna strips 22 arranged on the flexible substrate 21 of the QHA. A signal line for connection is further arranged as the additional electrode 23. The additional electrode 23 may be formed together when forming the antenna strip 22 pattern for operating as a spiral antenna on the flexible substrate 21, so that no additional cost is incurred, and the existing QHA mass production process is performed. Yield can also be maintained because it does not change. When the additional electrode 23 is configured on the flexible substrate 21 as described above, the connection between the upper substrate 25 and the lower substrate 24 connected to the flexible substrate 21 may be made by simple soldering. After the process, the bushing 27 of the multi-stage rod antenna is fixed to the bushing installation part provided on the upper substrate 25 by soldering 27. The bushing installation part is electrically connected to the additional electrode 23.

On the other hand, even if the additional electrode 23 is disposed in the space between the antenna strips 22 of the QHA in this way, the reception characteristic of the QHA does not change, and since the additional electrode 23 is formed in a spiral shape, the signal lines are simply connected vertically. Compared to the case, the electrical length of the multi-stage rod antenna 29 can be compensated for more, so that the lead length of the multi-stage rod antenna 29 can be reduced.

Of course, when the flexible substrate 21 of the QHA is configured as a double-sided substrate, the additional electrode 23 may be configured on the rear side of the substrate on which the antenna strip 22 is formed, and in this case, is completely separated from the operating region of the QHA. This does not affect the reception characteristics of the QHA at all.

Although two additional electrodes 23 of FIGS. 2 and 3 are configured, one or more additional electrodes 23 may be freely arranged, and when the rear surface of the flexible substrate 21 is used, more freely disposed (composing a longer line or forming a line It can be configured in various forms.

4 and 5 show an example of the upper substrate configuration of the QHA for configuring the integrated antenna as shown in FIG.

4 shows antenna connection patterns 31 and 32 for electrically connecting antenna strips of QHA in pairs to form two pillars, and a pattern 33 for connecting the additional electrodes and installing a bushing of a multi-stage rod antenna. An example of this configured upper substrate 30 is shown. Each of the patterns may include a pad portion to which an antenna strip formed on a flexible substrate and an additional electrode are connected, and the pad portion may have a through hole electrically connected to upper and lower portions thereof. For example, the antenna strip and the additional electrode formed on the flexible substrate are connected to the pad portion formed on the lower surface of the upper substrate 30 by soldering or the like, and the pattern 33 of the upper surface of the substrate for installing the antenna bushing is provided. The bushing of the rod antenna may be connected by soldering or the like.

The antenna connection patterns 36 and 37 may be configured to be wider than the through parts as shown in FIG. 5 in order to reduce the electrical effects of the through parts on the substrate, and the antenna connection patterns may be provided to pass through the through parts in a semicircular shape, although not shown. The configuration of the specific antenna connection pattern may be changed in various ways. Since the length of the antenna connection pattern may change the length of the filler connected to the antenna strip of the QHA, the reception characteristic of the QHA may be adjusted through this.

6 shows an example of the lower substrate 40 of the QHA, and shows a pad pattern 41 to which an external antenna line is connected, a pad pattern and a matching element (not shown) to which the external antenna line is connected. The pattern is formed through the pad pattern 44 to which the antenna strip is to be connected and the pad pattern 45 to which the additional electrode is to be connected. The rear surface of the lower substrate 40 shown is made of a ground plane and the ground line of the external antenna line is connected.

When the inductor for length compensation is disposed between the pad pattern 41 to which the external antenna line is connected and the pad pattern 45 to which the additional electrode is connected, the length of the multi-stage load antenna may be further reduced.

The pattern arrangement of the upper substrate and the lower substrate of the QHA also requires additional cost or additional time when additional patterns are formed for connection with the additional electrodes in the conventional pattern forming process. The cost is rarely incurred. However, since the number of solder parts is only slightly increased during mass production, even if the multi-stage rod antenna and QHA are combined, there is almost no cost for the combination, so the integrated DMB antenna combining the multi-stage rod antenna with the cost and time to produce the QHA is simple. Can be mass produced. In particular, the number of parts to be managed simply increases the number of elements for matching with the load antenna combined with the bushing, so that an antenna capable of receiving a plurality of DMB broadcasts can be very inexpensively configured and easily managed.

In addition, since the modular connector connected to the external antenna line is also configured in the same way as the existing, the integrated DMB antenna configured according to the present embodiment may be used by being connected to a satellite DMB receiving device or may be used by being connected to a terrestrial DMB receiving device. Versatility is very good. Meanwhile, when applied to a plurality of DMB receiving devices, the integrated DMB antenna may be used anywhere as a general external DMB receiving antenna because only an antenna switch is selectively connected to a corresponding broadcast receiving chip by an internal switch.

FIG. 7 illustrates a configuration example for further reducing the length of the multi-stage rod antenna, and a helical antenna unit 65 for length compensation is further configured under the multi-stage rod antenna 60 as shown. The helical antenna may be fixed to the lower rod of the multi-stage rod antenna to be pulled in and out through the bushing, but the multi-stage rod antenna may be pulled in and out through the internal space of the helical antenna. That is, a helical antenna may be additionally configured between the bushing and the multi-stage rod antenna, and the helical antenna unit 65 and the QHA part 50 may be accommodated in an outer case of the integrated antenna. Currently, the commercially available QHA antenna for satellite DMB has an unused space inside the case due to the reduction of the size of the QHA antenna, so that even if a QHA antenna case having a conventional size that constitutes a penetration part for entry and exit of the multi-stage rod antenna is used, Helical antennas can be placed inside the case.

That is, in the case of a multi-stage rod antenna, a helical antenna is compensated for by an additional electrode having a longer electric length (since it is arranged in a spiral) than the length lost by the QHA, and further compensating the electric length by the matching element. By additionally compensating for the length, the length of the load antenna can be greatly reduced. Therefore, the overall antenna length can also be configured to be the same or shorter than the length of the conventional terrestrial DMB antenna can be suppressed to increase the size of the antenna.

8 and 9 are characteristic graphs for confirming the terrestrial DMB reception characteristics of the integrated DMB antenna shown in FIG. 2, and the reception characteristics are obtained in a state in which the load antenna is drawn out.

As a result of confirming the terrestrial DMB receiving band and the satellite DMB receiving band with the load antenna drawn as shown in FIG. 8, the characteristics of the terrestrial DMB receiving band are shown in FIG. It can be seen that it is similar to an antenna.

10 and 11 are characteristic graphs for confirming satellite DMB reception characteristics of the integrated DMB antenna shown in FIG. 2, and the reception characteristics are obtained in a state where a load antenna is inserted.

As a result of confirming the characteristics of the terrestrial DMB reception band and the satellite DMB reception band in the state in which the load antenna is inserted as shown in FIG. 10, the characteristics of the satellite DMB reception band of the satellite DMB reception band are enlarged as shown in FIG. It can be seen that it is similar to the DMB dedicated antenna.

By modifying the structure of the QHA to combine the multi-stage load antenna as in the above-described embodiments, it is possible to suppress the increase in size while satisfying both the QHA reception characteristics and the load antenna reception characteristics, and to use it universally through a single module connector. The integrated DMB antenna can be mass produced without increasing the cost or yield. Meanwhile, in the case of the rod antenna, the length is compensated through the additional electrode, and the length can be further reduced through the additional helical antenna unit or the matching device configuration. In addition, it is possible to configure the integrated DMB antenna to which the helical antenna is applied without changing the size of the existing satellite DMB antenna case, thereby minimizing the inconvenience of using the integrated DMB antenna.

In the above described and illustrated with respect to preferred embodiments according to the present invention. However, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention. .

1 is an example of a receiver for receiving multiple DMB.

Figure 2 is a perspective view showing the structure of an integrated DMB antenna according to an embodiment of the present invention.

3 is a flexible substrate pattern diagram of an integrated DMB antenna according to an embodiment of the present invention.

4 and 5 are QHA upper substrate pattern diagram according to an embodiment of the present invention.

6 is a QHA lower substrate pattern diagram according to an embodiment of the present invention.

7 is a perspective view showing the structure of an integrated DMB antenna according to an embodiment of the present invention.

8 to 11 are graphs showing reception characteristics of broadcasts of the integrated DMB antenna according to an embodiment of the present invention.

** Description of symbols for the main parts of the drawing **

20: integrated DMB antenna 21: flexible substrate

22: antenna strip 23: additional electrode

24: lower substrate 25: upper substrate

26: bushing 28: modular connector

29: multi-stage rod antenna

Claims

A cylindrical antenna body having two pairs of antenna strips between an upper substrate having a through portion and a lower substrate including an additional electrode connection pattern, and an additional electrode for electrically connecting the upper substrate and the lower substrate between the antenna strips is disposed With QHA;

And a multistage entry / exit rod antenna having a bushing electrically connected to the signal line and installed in the upper substrate so as to be received inside the QHA through the upper substrate penetrating portion of the QHA.

The method of claim 1, wherein the upper substrate of the QHA

An antenna connection pattern for electrically connecting the antenna strips one by one;

A through hole formed at the center of the antenna connection pattern;

And a pattern to which the additional electrode is connected and to which the bushing of the rod antenna is to be fixed.

The method of claim 1, wherein the lower substrate of the QHA

And a pad pattern for connecting the pad pattern to which the antenna strip is to be connected, the pad pattern to which the additional electrode is to be connected, and an external antenna signal line through the matching element.

The integrated DMB antenna of claim 1, wherein a plurality of additional electrodes are formed in a space between the antenna strips of the QHA.

The integrated DMB antenna of claim 1, wherein the additional electrode is formed on a rear surface of a cylindrical antenna body in which an antenna strip of QHA is formed.

The integrated DMB antenna of claim 1, wherein the additional electrode is disposed while rotating the antenna body of the QHA and is applied as part of an electrical length of the rod antenna.

The integrated DMB antenna of claim 1, further comprising an antenna case surrounding the QHA and having a penetration portion through which the rod antenna can be pulled in and pulled out.

The integrated DMB antenna of claim 1, wherein the rod antenna further includes a helical antenna unit under the multi-stage rod.

The integrated DMB antenna of claim 8, further comprising an antenna case surrounding the QHA and the helical antenna unit, the antenna case including a through part through which the rod antenna can be pulled in and out.

A multi-stage rod antenna that is pulled in and pulled out;

A bushing for guiding the entry and exit of the rod antenna and fixing the lead antenna in and out;

An upper substrate having a through part through which the rod antenna is inserted and an installation part of the bushing;

A lower substrate configured with an external antenna line connection portion;

A cylindrical substrate on which an antenna strip for electrically connecting the upper and lower substrates is formed;

And an additional electrode formed between the antenna strips of the cylindrical substrate and electrically connecting an external antenna line connected to the lower substrate and an bushing installation portion of the upper substrate.

The integrated DMB antenna of claim 10, wherein the additional electrode is formed on a rear surface of the cylindrical substrate.

The integrated DMB antenna of claim 10, wherein the additional electrode is formed in plural.

The integrated DMB antenna of claim 10, further comprising a helical antenna unit capable of receiving and drawing the multi-stage rod antenna between the multi-stage rod antenna and the bushing.

The integrated DMB antenna of claim 10, wherein the additional electrodes are disposed spirally along the cylindrical substrate or in the form of a midenda to compensate for the electrical length of the multi-stage rod antenna.