KR101068798B1 - T-dmb antenna - Google Patents

Abstract

The present invention relates to a TDMB antenna for compensating an electrical length by embedding a PCB with a compensation circuit at the bottom of an antenna, and more specifically, by embedding a PCB with an antenna length compensation circuit at a bottom of the antenna. By ensuring redundancy, the configuration of the overall antenna appearance is not only simplified, but the performance is also related to the improved TDMB antenna. The TDMB antenna according to the present invention can reduce the length and diameter of the length compensator for compensating the electrical length and design the length and diameter of the rod antenna part extending to the length compensator irrespective of the value of the length compensator. By ensuring that the maximum length of the rod antenna portion that substantially radiation is made, there is an effect that can exhibit a performance close to the reception sensitivity of the single rod antenna and the helical antenna.

TDMB, Antenna, Compensation Circuit

Description

Terrestrial DMB Antenna {T-DMB ANTENNA}

The present invention relates to a TDMB (terrestrial DMB) antenna for compensating an electrical length by embedding a PCB having a compensation circuit embedded in a lower part of an antenna, and more specifically, by embedding a PCB having an antenna length compensating circuit in a lower part of the antenna. Guaranteeing redundancy in length and diameter not only simplifies the configuration of the overall antenna appearance, but also relates to improved TDMB antennas.

The existing TDMB antenna is required 38cm as the antenna length for the 200MHz TMDB frequency used for stable broadcast reception, the antenna length is relatively too long to be used in a mobile terminal has been proposed a variety of antenna configurations to simplify this.

Therefore, in order to ensure the overall antenna length but do not harm the appearance of the mobile terminal, the conventional antenna configuration is composed of a load antenna composed of multiple antennas in multiple stages or a helical antenna built in a specific structure to compensate for the overall antenna length. It was.

However, such a configuration satisfies the overall antenna length, but the lower end portion accommodating a plurality of upper ends constituting the rod antenna or the length of the specific structure is considerable, thus deteriorating the appearance of the antenna and externally in view of the mobile characteristics of the mobile terminal. There was a problem in using the antenna withdrawal or mounting.

Therefore, in order to solve this problem, an antenna which has been recently shortened to a length suitable for a portable terminal while guaranteeing a constant reception sensitivity by configuring the overall length of the antenna as a combination of different antennas has emerged.

1 is a view showing a configuration of a conventional TDMB antenna, and as described above, a predetermined length portion of the antenna is configured by the helical antenna (b), and the remaining portion is configured by the load antenna (a) to ensure the overall length of the antenna The structure to make is shown.

In particular, the helical antenna (b) configured at the lower end is designed to be configured to only partially compensate for the electrical length of the antenna is accommodated in the plastic structure, and does not emit a signal. Therefore, a contact is formed at the end of the helical antenna b so that the signal is radiated by drawing the rod antenna a out of the plastic structure. In addition, the rod antenna (a) consisting of a plurality of stages can be used to pull in and out from the plastic structure, the helical antenna (b) is configured in the form of wrapping around the rod antenna (a) during the pull-in.

This configuration is less signal sensitivity than the rod antenna (a) and the helical antenna (b) separately configured, but can ensure some portability due to the length compensation.

However, even in such a configuration, the length and diameter of the plastic structure must be ensured more than a predetermined time in order to embed the helical antenna. That is, the volume of the helical antenna must be larger than the diameter of the helical antenna due to the characteristics of the spring structure, and the volume must be guaranteed at least a certain pitch. Since the signal sensitivity characteristics are affected by the density of the pitch interval of the helical antenna, the pitch interval is greater than or equal to a predetermined interval. In accordance with the length of the lower end should also be guaranteed to be above a certain level. Therefore, although the length can be reduced rather than the configuration using the rod antenna and the helical antenna separately, the volume of the plastic structure in which the helical antenna is accommodated is rather increased by the diameter of the helical antenna and the thickness of the plastic structure. In addition, since the length of the plastic structure must also be ensured to some extent by a pitch pitch greater than or equal to the annular structure of the helical antenna, only a short appearance length for the single rod antenna and the helical antenna is reduced.

Therefore, there is a problem in that it does not have an absolute advantage in terms of aesthetics and portability as a whole, while taking a disadvantage of poor reception sensitivity.

In addition, the TDMB antenna, which is a combination of the rod antenna and the helical antenna, has a considerable manufacturing difficulty since the pitch spacing of the helical antenna must be configured at a predetermined interval in the manufacturing surface, and due to the radiation characteristics of the helical antenna The length occupied by the helical antenna among the entire lengths is greatly limited.

In addition, the plastic structure in which the helical antenna is embedded is considerably inconsistent due to the texture or color characteristics of different materials when combined with the rod antenna made of metal, but rather has a problem of impairing aesthetics.

Accordingly, the present invention reduces the length and diameter of the lower end of the antenna to compensate for the electrical length, thereby ensuring a considerable margin in the length and diameter of the rod antenna connected to form the contact with the lower end of the single rod antenna and the helical antenna The object of the present invention is to provide an antenna with maximum reception sensitivity and a reduced overall length.

In addition, an object of the present invention is to provide an antenna with improved portability by reducing the overall length, while having an appearance configuration that can give an aesthetic sense by simplifying the configuration of the lower end portion that compensates for electrical length.

In addition, the present invention is to configure a variety of materials of the lower end to have the same texture and color as the metal material of the rod antenna, it is possible to eliminate the aesthetic defects due to the different texture and color difference between the existing plastic structure and the rod antenna The purpose is to provide an antenna.

In addition, the present invention overcomes the increase in manufacturing cost due to the complicated manufacturing process resulting from the conventional helical antenna configuration, the manufacturing of the lower end is simple and the coupling configuration with the rod antenna is simple and the production efficiency and The purpose is to provide an antenna that can improve the yield.

In addition, an object of the present invention is to provide an antenna capable of receiving a multi-band through a variety of configurations of the bottom material.

In the TDMB antenna operating in the TDMB frequency band to achieve the above object, a multi-stage antenna is pulled out or pulled in, the load antenna unit for transmitting and receiving a signal, the support unit for fixing and feeding the antenna, the support unit and the load antenna It is formed between the parts, and may be composed of a length compensator for embedding a compensation circuit for compensating the electrical length of the antenna.

In this case, the length compensator may include a housing having a lower end made of a conductive material and an upper end made of a non-conductive material. The lower end of the housing may be made of metal, or the upper end of the housing may be made of ceramic or Teflon. have.

The length compensator may include a housing made of a non-conductive material, and a metal coating may be formed on an outer surface thereof.

The compensation circuit may include a PCB on which a metal pattern is formed, and at least one inductor or capacitor device formed between the metal patterns.

The length compensator may include a housing surrounding the compensating circuit, and a metal pattern may be formed on an outer surface thereof, or a letter or shape formed of metal may be coated.

In addition, the length compensator may include a PCB on which at least one inductor or capacitor device is mounted. In this case, the PCB may be a flexible PCB (FPCB).

The TDMB antenna according to the present invention can reduce the length and diameter of the length compensator for compensating the electrical length and design the length and diameter of the rod antenna part extending to the length compensator irrespective of the value of the length compensator. By ensuring that the maximum length of the rod antenna portion that substantially radiation is made, there is an effect that can exhibit a performance close to the reception sensitivity of the single rod antenna and the helical antenna.

In addition, the TDMB antenna according to the present invention uses a low-cost PCB with a simple pattern and elements as a compensation circuit, and the manufacturing process for electrical length compensation is completed by inserting only the compensation circuit into the length compensation unit. Since the manufacturing values of the length compensation unit and the rod antenna unit are not limited to each other, the overall antenna manufacturing convenience can be guaranteed and the manufacturing yield can be greatly increased.

In addition, the TDMB antenna according to the present invention not only increases the aesthetics by unifying the material of the length compensator with the material of the rod antenna part, but also stably supports the rod antenna by configuring a part of the length compensator with a non-conductive material. This has the effect of increasing the rigidity of the antenna.

In addition, the TDMB antenna according to the present invention by forming a letter or shape made of a predetermined pattern or metal through the metal coating on the outer surface on the outer surface of the length compensation unit to receive a high frequency band other than TDMB to achieve a multi-band antenna There is an effect that can be configured.

The TDMB antenna according to the present invention as described above will be described in detail with reference to the drawings.

2 is a plan view of a TDMB antenna according to an embodiment of the present invention, a length compensating unit (d) including a PCB having a compensation circuit for compensating an electrical length of the antenna, and the length compensating unit (d) ) May be configured as a load antenna unit (c) having a multi-stage configuration.

In this case, the compensation circuit inserts an inductor or a capacitor into a PCB having a predetermined pattern to compensate for the electrical length. In addition, the length compensating unit (d) surrounds the compensating circuit and configures the housing constituting the main body with a material having different properties to have a higher rigidity than that of a plastic structure in which a conventional helical antenna is embedded. The aesthetics can be enhanced based on the material and uniformity with the rod antenna part (c).

By partially compensating the electrical length of the entire antenna by the length compensator d, the electrical length of the length compensator d and the rod antenna part c satisfies the requirements for receiving the TDMB. The sum may be shorter than the combination antenna consisting of the helical antenna and the rod antenna shown in FIG.

In addition, since the thickness of the plastic structure in which the helical antenna is embedded is large in the conventional combination antenna of the helical and rod antenna, the inner diameter of the plastic structure for accommodating the helical antenna and the rod antenna at the same time is carried along with the outer diameter of the plastic structure itself. While considering the diameter of the helical antenna, which should be considered as a diameter in consideration of sex, the consideration of the diameter of the helical antenna that is to be guaranteed a certain degree conflict with each other, the diameter of the rod antenna consisting of the multi-stage is Limited by the diameter of the helical antenna, the diameter of the rod antenna is determined at a fairly small value.

In addition, since the pitch spacing of the helical antenna has to be kept above a certain level in order to ensure the minimum reception sensitivity, the extension length of the rod antenna, which is substantially radiated, also has a small proportion of the total electrical length of the antenna.

That is, although the plastic structure including the helical antenna that does not emit radiation in the combination antenna has a considerable diameter and length, the diameter of the rod antenna where the radiation is substantially reduced to a small diameter due to the constraints described above. Since the remaining length should cover the remaining electrical length, each stage of the rod antenna composed of multiple stages has a small space for accommodating the neighboring stages, and thus has a relatively small number of stages, and the load antenna occupies the entire electrical length. This lowers the reception sensitivity.

In contrast, the present invention not only has a thickness of the housing constituting the length compensating part d is significantly smaller than that of the plastic structure, and the compensating circuit is also restricted to a diameter for ensuring a constant reception sensitivity of the helical antenna. Since there is no, the length compensation unit (d) can be configured to have a minimum diameter through various patterns and device configurations.

In addition, since the rod antenna (c) has a structure in which each of the antenna stages composed of multiple stages is housed in the antenna stage of the lower end thereof, the rod antenna unit (c) can be manufactured according to the diameter of the rod antenna unit itself, not the diameter of the housing, and the length compensation. The extension length of the part d can also be manufactured to be significantly shorter than that of the plastic structure due to the short extension length of the compensation circuit.

Accordingly, when compared with the diameter of the plastic structure including the helical antenna of the conventional combination antenna, the rod antenna portion (c), which constitutes a smaller diameter of the rod antenna portion (c), and substantially emits radiation, is formed. The extension length of can be configured to be longer, thereby increasing the reception sensitivity.

That is, as shown in FIG. 2, the length of the length compensating part d is shortened so that the specific gravity of the rod antenna c in the total electrical length is shown in FIG. 1. It is much larger than the ratio of (c> a), so that the length of the rod antenna portion (c) where the actual radiation is substantial is significantly improved, and the reception sensitivity is greatly improved. Can be.

That is, in the present invention, the rod antenna portion (c) has a shorter extension length than the plastic structure when the rod antenna portion (c) is pulled in, and the rod antenna portion (c) has a larger diameter and extension with a smaller diameter than that of the conventional rod antenna. By having a length, it has better performance in terms of improved reception and portability.

In addition, referring to a detailed configuration of the length compensator d through FIG. 2 (a), the length compensator d is formed at both ends of a contact 140 for transmitting a signal, and the contact 140 is provided. ) Is coupled to a part of the pattern of the compensation circuit 110 to perform signal transmission through the compensation circuit 110.

In this case, as described above, the housing constituting the appearance of the length compensating part (d) may be formed of various materials. In FIG. 2 (a), the lower end of the housing is constituted by the conductor part 120, and the upper end part. Shows a first embodiment formed of a non-conductor portion 130. In this case, the conductor part 120 may be made of metal, and may be configured to be the same as the rod antenna part 130 made of a metal material through the metal configuration, so that the plastic structure and the metal when the combination antenna is constructed It can overcome the heterogeneity of the material with the rod antenna 130 made of water and improve the aesthetics due to the uniformity of the length compensating unit (d) and the rod antenna unit (c).

Meanwhile, in order to prevent the signal transmitted through the contact 140 from being conducted to the metal, one end of the metal may have a ceramic or teflon that is a non-conductor. In this case, the non-conductor 130 such as ceramic or Teflon exhibits rigidity, thereby stably supporting the rod antenna part c to give stability to the use of the antenna.

In addition, as a second embodiment of the housing, the entire outer appearance of the housing is constituted by a non-conductor portion, and then metal plating is performed on the outer surface of the non-conductor portion, so that a signal is transmitted through the contact point while maintaining the aesthetics as described above. It may take a configuration.

Meanwhile, referring to FIG. 2 (b), the compensation circuit embedded in the length compensating unit includes at least one inductor or capacitor element 113 on the PCB 111 on which a predetermined pattern 112 is formed. ), So as to compensate for the electrical length of the antenna. In this case, the arrangement of the pattern 112 and the element 113 shown in FIG. 2 (b) is described as an embodiment of the present invention, and the electrical length of the antenna compensated through various arrangements may be adjusted.

In addition, the PCB 111 may be made of a flexible PCB (FPCB) to allow the compensation circuit to be built in accordance with the standard of the housing, thereby facilitating the manufacture of the length compensating part (d).

On the other hand, when the housing is composed of a conductor, the antenna can be used as an antenna covering a multi-band, an embodiment thereof is shown in FIG.

First, a predetermined metal pattern 201 is formed on the outer surface of the housing constituting the length compensating part as shown in FIG. 3 (a) to cover the TDMB frequency band through an antenna leading to the compensating circuit and the rod antenna part. It is possible to cover the high frequency band through the antenna length leading to the metal pattern in all, it is possible to configure a multi-band antenna.

In addition, as shown in FIG. 3 (b), a letter or shape 202 of a metal pattern is formed on the outer surface of the housing, so that a signal is transmitted from the feeder to form an antenna leading to the letter or shape 202. In this case, the effects as described with reference to FIG. 3 (a) can be obtained.

Figure 4 shows a table comparing the reception sensitivity of the TDMB antenna according to the present invention with the reception sensitivity of the conventional combination antenna, it can be seen that the reception sensitivity is measured to the same value as shown.

As described above, the present invention has substantially the same performance as the conventional combination antenna, but has a significant advantage in terms of manufacturing time and cost compared to the conventional combination antenna including a complicated manufacturing process considering a helical antenna.

That is, the TDMB antenna as described above is manufactured by simply inserting a compensation circuit into the housing and manufacturing the rod antenna unit by extending the housing. It is much better.

In addition, the existing antenna should be accurately measured the pitch spacing and diameter of the helical antenna to be inserted into the plastic structure within the error range, and the manufacturing value of the housing must be determined thoroughly depending on the various values of the helical antenna.

In contrast, the present invention completes the manufacturing process by only inserting a compensation circuit in the housing and connecting the lower end of the rod antenna unit to one end of the housing, and the length compensating unit and the rod antenna unit are not limited to each other. Since the manufacturing process is very easy, a large amount of antennas can be produced at a lower cost than conventional antennas, and the error considered in manufacturing also corresponds to the diameter of the housing or rod antenna part, so that defective products can be significantly reduced than the existing antennas, resulting in high yield. Can be represented.

Figure 5 shows an embodiment of the multi-band reception form of the TDMB antenna according to the present invention, by receiving a high-frequency band (400 ~ 800Mhz) such as UHF as well as TDMB by a compensation circuit built in the length compensation unit A band antenna can be implemented.

Referring to FIG. 5, the compensation circuit 110 of the above-described TDMB antenna causes not only a length compensation for receiving a simple TDMB band but also a high frequency resonance corresponding to an electrical length from a power supply unit to a corresponding compensation circuit 110. . That is, length compensation and multi-band antenna configuration are possible by applying the compensation circuit 110.

In particular, when the position of the compensation circuit 110 is moved on the antenna, it is possible to adjust the resonant frequency of the high frequency band while maintaining the TDMB band reception. For example, when simultaneous reception of the TDMB band and the UHF band is required, such as DVB-T, an antenna that can be easily coped can be configured.

)는 작아져 더 높은 대역에서 공진하고, 상기 로드 안테나부(e)에 가깝게 위치시킬 수록 파장 길이(

)가 길어져 더 낮은 대역에서 공진할 수 있도록 함으로써, TDMB 대역 수신(

)을 유지한 상태로 추가되는 고주파 대역에 대한 튜닝을 자유롭게 실시할 수 있다.As shown in FIG. 5, the wavelength length of the length compensator f is increased as the position of the compensator circuit 110 moves closer to the supporter 150 that fixes and feeds the antenna.

) Becomes smaller and resonates in a higher band, and the closer to the rod antenna portion e, the longer the wavelength length (

) Can be longer to resonate in the lower band, thereby receiving TDMB band (

It is possible to freely perform tuning for the high frequency band added while maintaining a).

1 is a plan view of a terrestrial DMB antenna composed of a conventional helical and rod antenna;

2 is a plan view and a compensation circuit diagram of a terrestrial DMB antenna according to the present invention;

3 is a diagram illustrating an embodiment for multi-band support of a terrestrial DMB antenna according to the present invention;

4 is a table showing a reception sensitivity comparison between the terrestrial DMB antenna and the conventional DMB antenna according to the present invention.

5 is a view showing an embodiment of a multi-band implementation of the terrestrial DMB antenna according to the present invention.

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

110: compensation circuit 111: PCB

112: pattern 113: inductor or capacitor device

120: conductor portion 130: non-conductive portion

140: contact 150: support

201: metal pattern 202: letter or shape of the metal

Claims (12)

In the antenna operating in the TDMB frequency band, A load antenna unit configured to draw out or draw in a plurality of antenna rods configured in multiple stages to transmit and receive signals; A support unit for fixing and feeding an antenna operating in the TDMB frequency band including the rod antenna unit; A housing positioned between the support portion and the rod antenna portion to connect the lowermost end of the rod antenna portion and the support portion with the same size as the outermost end diameter of the rod antenna portion while maintaining continuity; Including a length compensation unit having a compensation circuit for compensating the electrical length of the antenna while electrically connecting between the support and the support, The housing is an insulating region for the operation of the compensation circuit, the non-conductive material is composed of less than 30% of the entire area, and the rest of the other area is composed of a conductive material that emits a signal fed with the rod antenna unit TDMB antenna. delete The method according to claim 1, TDMB antenna, characterized in that the conductive material of the housing is metal. The method according to claim 1, TDMB antenna, characterized in that the non-conductive material of the housing is composed of a ceramic or Teflon. delete The method according to claim 1, The compensation circuit A PCB having a metal pattern formed thereon; At least one inductor or capacitor device formed between the metal patterns TDMB antenna, characterized in that consisting of. In the antenna operating in the TDMB frequency band, A load antenna unit configured to draw out or draw in multiple antennas to transmit and receive signals; A support for fixing and feeding the antenna; A length compensator formed between the support part and the rod antenna part and including a compensation circuit for compensating an electrical length of the antenna, And the length compensating part includes a housing surrounding the compensating circuit, and a metal pattern is formed on an outer surface thereof. In the antenna operating in the TDMB frequency band, A load antenna unit configured to draw out or draw in multiple antennas to transmit and receive signals; A support for fixing and feeding the antenna; A length compensator formed between the support part and the rod antenna part and including a compensation circuit for compensating an electrical length of the antenna, The length compensation unit includes a housing surrounding the compensation circuit, and a TDMB antenna, characterized in that the letter or shape formed of a metal coated on the outer surface. The method according to claim 1, The length compensator TDMB antenna, characterized in that the inductor or capacitor element comprises a PCB mounted with at least one. The method according to claim 9, The PCB is a TDMB antenna, characterized in that the FPCB (Flexible PCB). The method according to claim 1, TDMB antenna characterized in that it operates as a multi-band antenna resonating in a high frequency band other than the TDMB band according to the position of the compensation circuit. The method of claim 11, TDMB antenna, characterized in that the reception of the UHF band corresponding to the length between the compensation circuit at the feed point of the support.

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