KR100726608B1 - Repeater applied elements for mobile station - Google Patents

Abstract

A repeater to which elements for a mobile communication terminal is provided to implement filters, LNAs and mixers by using elements of the mobile communication terminal, which has lower power consumption property, better power property, and small signal loss property. A repeater to which elements for a mobile communication terminal are applied comprises LNAs(Low Noise Amplifier, 203,207,233,237), mixers(205,209,213,221,235,239,243,251), SAW(Surface Acoustic Wave) filters and PAMs(Power Amplifier Module, 223,253). The LNAs(203,207,233,237) amplify low noises of inputted signals. The mixers(205,209,213,221,235,239,243,251) convert the inputted signals into specific frequency band signals. The SAW filters enhance isolation property of a guide band by adding an LC matching circuit and controlling a position of passed band. The PAMs(223,253) add the first matching circuit and the second matching circuit to an RF inputting end and an RF outputting end, respectively for making individual tuning possible.

Description

Repeater applying element for mobile communication terminal {REPEATER APPLIED ELEMENTS FOR MOBILE STATION}

1 is a view showing the configuration of a general repeater.

2 is a view showing the configuration of a repeater according to an embodiment of the present invention.

3 illustrates SAW filter matching of a forward path in accordance with an embodiment of the present invention.

4 illustrates SAW filter matching of a reverse path according to an embodiment of the present invention.

5 illustrates matching of a SAW duplexer in accordance with an embodiment of the present invention.

6 is a view for explaining the tuning of the PAM for mobile communication terminal according to an embodiment of the present invention.

* Explanation of Codes on Major Parts of Drawings *

203, 207, 233, 237: LNA

205, 209, 213, 221, 235, 239, 243, 251: filter

215, 245: amplifier

223, 253: PAM

The present invention relates to a repeater, and more particularly to a repeater to which the device for a mobile communication terminal is applied.

Generally, the filter applied to the repeater is a dielectric filter, which requires sharp skirt characteristics and excellent isolation characteristics along the path. Therefore, it is common to design and use it exclusively. In addition, the PAM (Power Amplifier Module) of the repeater can also support the multi-carrier characteristics, it is common to design and use only for the repeater is sensitive to the separation characteristics of the front filter. In addition, it is common to use a dedicated low noise amplifier (LNA) and a mixer for the repeater in consideration of the high voltage and noise of the repeater.

1 is a view showing the configuration of a general repeater.

The repeater of FIG. 1 is composed of a forward circuit and a reverse circuit. For convenience of the invention, only the forward circuit will be described. However, those skilled in the art will readily understand that the reverse circuit operates in the reverse direction of the forward circuit.

The operation of the forward circuit of a general repeater is as follows.

The signal to be transmitted to the mobile terminal is output through the two LNAs (103, 107) and two filters (105, 109) amplified, and mixed with the intermediate frequency in the mixer 111, the intermediate frequency filter 113 Amplify the band-passed signal in the amplifier 115 and again with the frequency to be sent out from the mixer 117 and then amplify to high power in the amplifier 119 and specify it in the RF filter 121. The filter is filtered through a band and transmitted through the transmission antenna via the PAM 123 and the duplex 131. The reverse circuit operates through the elements 133, 135, 137, 139, 141, 143, 145, 147, 149, 151, 153, 101 in the reverse direction of the forward circuit.

Because each of these configurations uses a common logic voltage, the external voltage uses a stabilized voltage through a regulator, which generates a lot of heat and is not power efficient in a repeater environment where the output fluctuates frequently. Therefore, there is a problem in that volume and cost are generated because a heat dissipation measure that can cope with heat generation is required.

In addition, the heat generated by the high voltage also occurs in the LNA (103, 107, 133, 137) and the PAM (123, 153), and thus there is a problem that can not be densely configured for heat dissipation of these devices.

Accordingly, the above-mentioned devices were all developed exclusively for the repeater and had to be designed if necessary or selected from a limited lineup of products. In addition, since the repeater is dedicated, the volume and power consumption are large, the size of the power supply unit is increased, and the heat generation is severe, which required a contrast design.

In addition, if some of them are to be replaced by a device for a mobile communication terminal with a small power consumption and a large lineup, the device characteristics designed for a single frequency may conflict with the multi-carrier characteristics and there is a risk of oscillation due to isolation characteristics. This was difficult.

Accordingly, an object of the present invention is to provide a repeater employing elements for mobile communication terminals with low power consumption and good characteristics and low signal loss.

In addition, another object of the present invention is to provide a repeater capable of applying a low drop out (LDO), integrated design.

To this end, a repeater employing an element for a mobile communication terminal according to an embodiment of the present invention, at least one low noise amplifier (LNA) for low noise amplifying the input signal, and at least one for converting the signal into a specific frequency band At least one SAW filter for improving isolation characteristics of the guide band by adding a mixer and an LC matching circuit to adjust the position of the pass band, and a first matching circuit and a second matching circuit at the RF input terminal and the RF output terminal. And a power amplifier module (PAM) for at least one mobile communication terminal, wherein each matching circuit is added to enable individual tuning.

Here, the apparatus further includes a low drop out (LDO) for supplying power less than 3V to each component of the repeater.

In addition, the low noise amplifier and the mixer may be configured as a single chip, or the at least one low noise amplifier, the at least one SAW filter and the at least one mixer may be configured as a single module.

The present invention is to simplify the configuration of the repeater by replacing the main components of the repeater with the module by configuring the chip for the mobile communication terminal and the filter for the mobile communication terminal configured to integrate a low noise amplifier (LNA) and a mixer as a unit module Reduce development and manufacturing costs and diversify product line-ups through shared components.

In addition, according to the widespread application of the devices for the mobile communication terminal, an additional power supply unit can be replaced with a high-efficiency power supply unit, thereby lowering heat generation, thereby maximizing the efficiency of device placement, thereby dramatically increasing the size of the same performance repeater. Reduce power consumption significantly.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments. Like reference numerals refer to like or similar elements throughout the drawings.

2 is a block diagram showing a repeater according to the present invention.

The repeater of FIG. 2 is similar in structure to that of the conventional repeater shown in FIG. 1, and thus, detailed operation thereof will be omitted.

In FIG. 2, red blocks 260 and 270 are unit modules to which the devices for mobile communication terminals are applied, and black blocks 263, 265, 273 and 275 are integrated with LNAs and mixers being mass-produced for mobile communication terminals. Chip. Here, the chip integrated for the mobile communication terminal can be easily obtained since it is commercially available.

The filter 205, 213, 221, 235, 239, and 251 of FIG. 2 uses a SAW filter for a mobile communication terminal. The filter 205, 213, 221, 235, 239, and 251 uses a multi-stage configuration to improve skirt characteristics and to improve isolation characteristics through LC matching. . Therefore, even if the PAMs 223 and 253 for the mobile communication terminal are applied, the risk of oscillation can be reduced. Subsequently, the PAMs 223 and 253 for the mobile communication terminal may also match the multicarrier characteristics to the repeater by adjusting the overcurrent through the reference voltage and the driving voltage.

This will be described in more detail with reference to FIGS. 3 to 5.

The LC matching circuits 350, 450, 550, and 570 are added to the SAW filters 300 and 400 and the SAW duplexer 500 illustrated in FIGS. 3 to 5 to adjust the position of the pass band to adjust the position of the guide band. Matching means for improving isolation characteristics and a number increasing means for increasing the number of stages of the SAW filters 300 and 400 to improve the skirt characteristics of the filter are used together.

In this case, the general LC type filter may increase the number of stages and increase the order of the filter, so that the signal attenuation may occur instead of the skirt characteristic. However, the SAW filters 300 and 400 and the SAW duplexer 500 may have a mechanical pass band. As a result, signal attenuation does not occur significantly even in a multi-stage configuration.

3 is a diagram illustrating matching of a SAW filter in a forward path according to an embodiment of the present invention. An LC matching circuit 350 is added to an output terminal of the SAW filter 300 to improve band separation characteristics.

4 is a diagram illustrating matching of SAW filters in a reverse path according to an exemplary embodiment of the present invention. An LC matching circuit 450 is added to an input terminal of the SAW filter 400 to improve band separation characteristics.

In addition, LC matching circuits 550 and 570 are added to the antenna and the receiving line of the SAW duplexer 500 as shown in FIG. 5 to further improve the separation characteristics of the SAW duplexer 500 and the SAW filter 400. Let's do it. In this case, L and C represent an inductor and a capacitor.

In particular, when the matched SAW filters 300 and 400 configured as described above are configured in multiple stages, the skirt characteristics may be further improved.

Meanwhile, if the isolation characteristics of the SAW filters 300 and 400 and the SAW duplexer 500 for the mobile communication terminal can be improved in this way, as shown in FIG. 6, the movement sensitive to the front isolation characteristics is illustrated. The present invention can also be applied to a PAM 600 for a communication terminal.

That is, the PAM 600 is for a mobile communication terminal, and devices having various characteristics are commercialized, their characteristics are disclosed, and since they are mass produced, there is no problem in supply and demand, and the price is low, and thus, the most suitable type for the multicarrier characteristics Select PAM 600.

In particular, recently, a composite terminal supporting multiple bands through a single transmission / reception path has been released, so that the PAM 600 can also obtain a kind of enhanced characteristics for multiple bands. Only oscillation by the front isolation characteristic or the use voltage is different from that for the repeater, so it is necessary to match various driving voltages.However, after improving the isolation characteristics of the filter as described above, PAM is applied. Matches and adjusts the bias voltage and reference voltage values of (600) to show characteristics suitable for multicarriers, and uses a PAM 600 that accommodates a wide range of voltages, or a power efficient LDO. The problem is solved by using (Low Drop Out).

FIG. 6 is a diagram illustrating tuning of a PAM according to an embodiment of the present invention. A matching circuit 610 is added to an RF input terminal of a PAM 600 for a mobile communication terminal, and a matching circuit 620 is applied to an RF output terminal. In addition, spurious, ripple, or standing wave ratio (VSWR) may be added to tune separately to each other as needed, thereby further reducing the possibility of oscillation and corresponding to multicarriers. Here, the matching circuits 610 and 620 are appropriately configured with a capacitor and an inductor.

As described above, the mobile communication terminal filters 205, 213, 221, 235, 239 and 251 and the PAMs 223 and 253 are applied to the repeater, thereby providing LNAs 203, 207, 233 and 237. ) And mixers 211, 217, 241, 247 can also be applied to repeaters. In particular, the use of such mobile communication device elements reduces the need to maintain the power supply (not shown) of the repeater at a high voltage using a regulator, and thus, the high-efficiency LDO Drop Out, not shown).

In this case, unlike the regulator, the LDO has a low input / output voltage difference, thereby lowering its own heat generation and reducing the heat generation of the mobile communication terminal elements. In addition, as described above, a repeater composed of devices operating at high efficiency and low heat generation voltage and low driving voltage does not require a separate heat dissipation countermeasure due to low overall heat generation. The elements may be disposed on both sides of the substrate. And, since most of the repeaters have a similar structure and differ only in output, the repeaters can be mass-produced with only simple components by modularizing the illustrated red block portions 260 and 270.

The PAMs 223 and 253 of the output stages not bound by the red block may change outputs by simply applying a different kind or simply adjusting gains according to desired output characteristics, thereby facilitating adjustment of various lineup configurations or products.

While the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will recognize that various modifications or changes can be made without departing from the spirit and scope of the invention.

According to the present invention, the filter unit, the LNA and the mixer of the repeater are implemented by using the elements for the mobile communication terminal having low power consumption and good characteristics and low signal loss, thereby greatly reducing the size and cost.

In addition, according to the present invention, it is possible to reduce the power consumption of the repeater to cope with various power supply environment.

In addition, according to the present invention, by modularizing the core portion of the repeater using the device for a mobile communication terminal, there is an effect that can facilitate the process, reduce the development time and reduce the cost.

In addition, according to the present invention, it is possible to increase the power efficiency and reduce the heat generation so as not to configure a separate heat generating means, and to increase the placement efficiency of the elements to significantly reduce the size.

In addition, according to the present invention, by adjusting the gain of the PAM (223, 253) connected to the modules (260, 270), it is possible to simply configure a repeater of various outputs, and to easily adjust the output of the already configured repeater. .

In addition, according to the present invention, the development cost, production cost and management cost to configure a variety of lineup for the repeater has a lower cost than the existing repeater.

Claims (4)

At least one low noise amplifier (LNA) for low noise amplifying the input signal, At least one mixer for converting the signal into a specific frequency band; At least one SAW filter which adds an LC matching circuit to adjust the position of the pass band to improve isolation characteristics of the guide band, A mobile communication terminal device comprising at least one power amplifier module (PAM) for each of the mobile communication terminals by adding a first matching circuit and a second matching circuit to the RF input terminal and the RF output terminal, respectively, to enable individual tuning. Repeater applied. The method of claim 1, And a low drop out (LDO) for supplying power of less than 3V to each component of the repeater. The low noise amplifier and the mixer of claim 1, Repeater applying a device for a mobile communication terminal, characterized in that consisting of a single chip. The method according to claim 1 or 2, And the at least one low noise amplifier, the at least one SAW filter, and the at least one mixer are configured as a single module.

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