KR20030088993A - Dielectric duplexer - Google Patents

Abstract

PURPOSE: A dielectric duplexer is provided to control the impedance, the capacitance, and the bandwidth by forming a both-sided pattern bar on an open side and an upper side neighboring to the open side of a dielectric block. CONSTITUTION: A dielectric duplexer includes a dielectric block(D2), a resonator, and an input/output electrode portion. The dielectric block(D2) includes one side formed with an open side(12) and the remaining sides formed with external conductors. The resonator includes a plurality of holes(R11-R18) formed between the open side and a bottom side of the dielectric block(D2). The holes(R11-R18) are operated as band pass filters of a transmitting end and a receiving end. Conductive materials are coated on each inner surface of the holes(R11-R18). The input/output electrode portion is formed at the open side and the neighboring side of the dielectric block(D2) in order to perform a signal transfer function. A both-sided pattern bar(20) is formed on the open side and an upper side(11) of the dielectric block(D2).

Description

Dielectric duplexer

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dielectric duplexer, and more particularly, to a dielectric duplexer capable of miniaturization and improved bandwidth and signal attenuation characteristics.

In the information age, the use of mobile communication devices using high frequency circuits such as home wireless telephones and PCS mobile communication terminals is increasing rapidly. Therefore, the components used in the high frequency circuit have a lot of difficulties in design to effectively prevent the interference of the frequency and suppress the harmonics.

Among the components used in the high frequency circuit, a band pass filter or a band stop filter for passing or blocking only necessary signals among high frequency signals is currently used, and the most widely used dielectric filter is the front of a wireless device. -It is used for front-end transceiver.

The implementation method of the dielectric filter is divided into an integrated filter and a resonator coupled filter. In the integrated filter, a resonator hole is formed in a dielectric block formed of one block, and a coupling pattern for coupling an input / output electrode and a coupling is formed. At this time, there is an interdigital or gap capacitance between the non-electrode portions. By adjusting the capacitance, the coupling value between the resonators can be adjusted.

On the other hand, the resonator coupling type filter is a structure in which a plurality of resonators are coupled through a coupling board to control the coupling between the resonators by using a pattern or individual elements on the board.

As shown in FIG. 1, the dielectric duplexer according to the related art is a dielectric block in which an outer conductor is formed by applying a conductive material to the entire exterior including one edge of one side of the opening surface 2 and forming an outer conductor. First to eighth resonator holes in which an inner conductor is formed by applying a conductive material to the inner surface of the hole penetrating from the opening portion 2 of the dielectric block D1 to the corresponding rear surface 3 of the dielectric block D1; R1, R2, R3, R4, R5, R6, R7, R8 and formed on the open surface (2) and the upper surface (1) of the dielectric block (D1) to provide the function of signal input and output to the band pass filter The first and second input and output electrodes to be performed, and the antenna electrodes (P1, P2, Ant1).

Here, one end of the resonator holes R1 to R8 is a short end connected to the ground at the rear surface 3 of the dielectric block, and the second to fourth resonators R2, R3, and R4 and the fifth to seventh resonators ( R5, R6, and R7 are the bandpass filters of the transmitting and receiving terminals Tx1 and Rx1, and the first and eighth resonators R1 and R8 are operated as band stop poles (Pole) which form an attenuation pole.

In this case, the conductive material coated on the surface 1 adjacent to the open surface 2 on which the fifth to seventh resonators R5, R6, and R7 serving as the band-pass filter of the receiving end Rx1 are formed is the open surface. (2) The characteristics of the dielectric duplexer are adjusted by forming the corner at a predetermined distance t1 and adjusting the gap t1.

In the transmitting terminal Tx1, the first input / output electrode P1 is operated as an output port of a band pass filter, and in the receiving terminal Rx1, the second input / output electrode P2 is operated as an input port, and the antenna electrode Ant1 is operated. Is shared by the input port of the transmitting end Tx1 and the output port of the receiving end Rx1.

The first and second input / output electrodes P1 and P2 are shared between the band stop filter and the adjacent resonator hole, and the first and second input / output electrodes and antenna electrodes P1, P2, and Ant1 are dielectric blocks D1. It is separated from the outer conductor by an exposed isolation pattern of.

In the conventional dielectric duplexer configured as described above, the performance, in particular, the signal attenuation characteristic of the resonator hole is improved by adjusting the gap or changing the electrode pattern.

However, such an attempt has a problem in that the implementation of circuits and characteristics in a limited size of a dielectric duplexer which is gradually miniaturizing is difficult to achieve due to a design or manufacturing difficulty in order to meet the technical trend.

The present invention has been made to solve the above problems of the prior art, the object of the present invention is to provide a dielectric duplexer that can easily increase the bandwidth and signal attenuation characteristics while keeping up with the trend of the dielectric duplexer is gradually miniaturized. It is.

1 is a perspective view showing the structure of a dielectric duplexer according to the prior art,

2 is a perspective view showing the structure of a dielectric duplexer according to the present invention;

3 is a graph showing the frequency characteristics of the dielectric duplexer according to the prior art and the dielectric duplexer according to the present invention.

<Explanation of symbols on main parts of the drawings>

D2: Dielectric Block 11: Top

12: open side 13: rear

Ant2: antenna electrodes P11, P12: first and second input / output electrodes

R11 to R18: first to eighth resonator holes

20: double sided pattern bar

The dielectric duplexer according to the present invention for solving the above problems is a dielectric block having one surface as an open surface and an outer conductor formed on the outer surface except the surface, and penetrated and penetrated from the open surface of the dielectric block to the lower surface. A passband resonator comprising a plurality of holes formed at predetermined intervals by coating conductive material on the inner surface to operate as a transmitter and receiver bandpass filter, and formed on an open surface and a neighboring surface of the dielectric block to pass through the transmitter and receiver bandpass. In a dielectric duplexer including an input / output electrode unit that performs a signal transfer function between filters, the receiving end bandpass filter has a double-sided pattern bar formed over an open surface of the dielectric block and an upper surface adjacent to the dielectric block.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view showing an embodiment of the dielectric duplexer according to the present invention.

In the dielectric duplexer according to the present invention, a dielectric block (D2) having one surface as an open surface 12 and an outer conductor formed by applying a conductive material to the entire outside including one edge of the open surface 12, and the dielectric block First to eighth resonator holes R11, R12, R13, R14, in which an inner conductor is formed by applying a conductive material to the inner surface of the hole penetrating from the one open surface 12 of D2 to the corresponding other rear surface 13; First and second input / outputs formed across R15, R16, R17, and R18 and the open surface 12 and the upper surface 11 of the dielectric block D2 to perform a function of signal input and output to the band pass filter. Electrodes, antenna electrodes P11 and P12 and Ant2, and fifth to seventh resonators R15 forming the reception band pass filter over the surface 11 adjacent to the open surface 12, that is, the upper surface 11; The double-sided pattern bar 20 is formed in parallel with R16 and R17.

In this case, the double-sided pattern bar 20 adjusts impedance and capacitance components according to the distance t3 from the fifth to seventh resonators R15, R16, and R17, and the pattern bar 20 and the upper surface 11. Since the bandwidth can be adjusted according to the distance (t2) to the conductive material applied to the), it is easy to implement the circuit configuration and characteristics of the dielectric duplexer in a limited space to improve the bandwidth increase and attenuation characteristics.

Meanwhile, one end of the resonator holes R11 to R18 is a short end connected to the ground at the rear surface 13 of the dielectric block, and the second to fourth resonators R12, R13, and R14 and the fifth to seventh resonators ( R15, R16, and R17 operate as band pass filters of the transmitting and receiving terminals Tx2 and Rx2, and the first and eighth resonators R11 and R18 operate as band stop filters that form an attenuation pole.

In the transmitting terminal Tx2, the first input / output electrode P11 is operated as an output port of a band pass filter, and in the receiving terminal Rx2, the second input / output electrode P12 is operated as an input port and the antenna electrode Ant2. Is shared by the input port of the transmitting end Tx2 and the output port of the receiving end Rx2.

The first and second input / output electrodes P11 and P12 are shared between the band stop filter and an adjacent resonator hole, and the first and second input / output electrodes and the antenna electrodes P11 and P12 and Ant2 are divided into the dielectric block D2. Separated from the outer conductor by an exposed isolation pattern of

3 is a graph showing the frequency characteristics of the dielectric duplexer according to the prior art and the dielectric duplexer according to the present invention.

At this time, reference numerals A and B described in FIG. 3 are the frequency characteristics of the dielectric duplexer according to the prior art and the dielectric duplexer according to the present invention, respectively, wherein the dielectric duplexer according to the present invention is a dielectric according to the prior art Compared to the duplexer, the bandwidth is increased and the attenuation characteristics are improved.

The dielectric duplexer of the present invention configured as described above forms a double-sided pattern bar in parallel with a plurality of resonators constituting the receiving end band pass filter on an open surface and an upper surface adjacent to the open surface, so that the pattern bars and the plurality of resonators are formed. Since the impedance capacitance and the bandwidth of the dielectric duplexer can be adjusted by adjusting the distance and the distance between the pattern bar and the conductive material applied on the upper surface, there is an effect of realizing circuit configuration and characteristics in the limited size of the dielectric duplexer.

Claims (1)

A dielectric block having one surface as an open surface and an outer conductor formed on the outer surface except the surface; A passband resonator configured to be a transmitter and a receiver bandpass filter formed of a plurality of holes formed at regular intervals by penetrating through the open surface of the dielectric block and penetrating from the lower surface to the conductive material; In the dielectric duplexer formed on the open surface and the adjacent surface of the dielectric block and composed of an input and output electrode portion for performing a signal transfer function between the transmitting end and the receiving end band pass filter, And the double-sided pattern bar is formed on the receiving end bandpass filter over an open surface of the dielectric block and an upper surface adjacent to the dielectric block.