TWM260882U - Harmonic wave restrictive multi-layer ceramic low pass filter - Google Patents

Description

M260882 IV. Creation Instructions (1) ~ ------ [Technical Field to which the New Type belongs] This creation refers to a kind of harmonic suppression refers to a kind of injection-layer ceramic low-pass filter that can respond to harmonics, especially good high frequency Harmonic suppression function is used to fine-tune the design loss poles. [Previous technology] The filter has different low-pass characteristics due to the combination of resistance, inductance, electrical office filter, high-pass filter, and band-pass filter. The principle is also different. Γ /, band rejection filter. The structure of the above-mentioned band-pass filter is described in No. 431017, Invention Name: Multi-layered Lei, Republic of China Patent Announcement No. 1 is the minimum insertion loss at the microwave frequency and a = waveguide. According to the wave device's main wide-type multi-layer dielectric dissipation mode, it is used to achieve extremely narrow band low-pass filters and band-pass filters, although both are powered by electricity. "^ This creation has different applications of Fan Ming." There are different fields of scope 'and the low-pass chirp in the communication system' no matter the S receiving or transmitting part must have a low-pass filter design, especially the suppression of high-frequency harmonics generated after power amplification Widely used in radio, wireless local area network (WLAN), Bluetooth (Bluetooth) technology Van mouth. The traditional low-pass filter equivalent circuit is shown in Figure 丨 A, which is composed of an input capacitor 11, a first inductor 12, a second inductor 13, a ground capacitor 14, and an output capacitor 15. The appearance of the ceramic low-pass filter is shown in FIG. 1B. The first inductor 12 and the second inductor 13 are composed of M260882 shown in Figure 1B. 4. The narrow transmission lines 21 and 22 shown in the creative description (2); the input capacitor η, the ground capacitor η, and the wheel-out capacitor 15 are formed by the first The wide microstrip lines 23, 24, and 25 shown in Figure 1B are composed of 0. However, the traditional low-pass filter 1 has the following shortcomings: · 1 · The injection loss pole generated by this circuit is infinite (such as (Figure 2), the suppression effect of high frequency is extremely poor. 2 · To suppress the expected high-frequency signal, the low-pass filter 1 q must be connected in series.

Only in order to reduce the injection loss pole to the expected frequency, this will increase the order of the circuit, and greatly increase the layering of the circuit; and in order to meet the requirements of the circuit, continue to increase the wide microstrip line in Figure 1B 2 3, After the width of 24, 25 (increasing the electric valley quality), transporting some wide microstrip lines 23, 24, and 25 may cause high-frequency oscillations, resulting in poor high-frequency suppression effects. As shown in FIG. 3A, it is a circuit improved for the disadvantage that the injection loss pole of the low-pass filter in FIG. 1 is infinite. The low-pass filter 10 'is mainly at the first inductor 12 and the second inductor 13, and a first parallel-connected valley 16 and a second parallel-connected capacitor 17 are connected in parallel, respectively. These two parallel inductors and the valley branch are equivalent to an open circuit at the resonance point, and can generate an injection loss pole at a finite frequency point. However, this low-pass filter 10 still has the following disadvantages:

After the RF fundamental frequency passes through the RF amplification circuit, it will generate high-frequency harmonics such as 2 harmonics and 3 harmonics due to non-linear amplification. It can only generate an injection loss pole 30 (insertion l0ss) (as shown in Figure 3B). (Shown), for the harmonic suppression generated after the power amplification, the order of the low-pass filter must be increased by 10, so that the order of the circuit can be increased, which will greatly increase.

M260882 IV. Creation Instructions (3) Layering of Circuits

2. Since the first parallel-connected valley 16 and the second parallel-connected capacitor I? In parallel are too small (caused by edge coupling), so that the injection loss of these limited frequencies is extremely difficult to design near the pass band, so the first The low-pass filter 10 shown in the figure is not very effective in reducing the order of the filter and improving the process yield. u & [New content] The reason is that this ceramic low-pass filter adjusts the low-pass filter and spreads the various injection losses, with a minimum basis of the aforementioned capacitance, the first loss of the output power, the consumption of the pole, the adjustment of the two series inductors and the first The two injection losses are small, reaching the above-mentioned horizontal adjustment section, adjusting the length of the upper section through the pipe, and injecting the main device of the loss pole creation, which can generate the order of the normal circuit between the inductor poles in the device. The purpose of this creative package is At least two values are changed to make the best include: capacitance, a first series of electrical adjustment capacitors, a second inductance, the loss of the pole between the capacitor and the ground, and the purpose. ’The lower section of the loss pole runs through the tube up and down and is fine-tuned to the desired range. Pole tuning's main purpose is to provide a harmonic that injects the desired harmonics of the injected loss and suppresses the input inductance, the first loss pole, and the entire inductance system. Wave energy falls into the control effect. A multi-layer grounding capacitor is used to adjust the inductance in series through the frequency value. Two capacitors are connected in series to adjust the inductance at the point of the first pass filter. One and one point of the large point that can induce inductance is adjusted through the upper section of the pipe. It is composed of upper and lower horizontal adjustment sections. The position of the horizontal adjustment section and the required inductance of the upper and lower sections can be used to adjust the M260882 between harmonics. Creation instructions (4) The structural design and operating principle of this creation Make a detailed explanation of the month and refer to the attached drawings to further understand the characteristics of this creation. [Embodiment] As shown in FIG. 4, it is an equivalent circuit diagram of this creation. The low-pass filter 40 includes: an input capacitor 41, which is connected between the input terminal ^ and the place; an output capacitor 42 Is connected between the output terminal OUT and the location, two pairs of ground capacitors 43 are connected to the location and the loss pole adjustment inductor 48; a first series inductor 44 is connected to the input terminal ^ and the loss pole adjustment inductor 48 A second series inductor 45 connected to the output terminal οτ and the loss pole adjustment inductor 48; a first loss pole adjustment capacitor 46 connected to the ground capacitor 43 and the input terminal IN; a second loss pole adjustment capacitor 47 , Connected to the ground capacitor 43 and the output terminal OUT; a loss pole adjustment inductor 48, which has a fine tuning effect, and can change the frequency value of the injection loss pole and the frequency range between each injection loss pole. According to the three-dimensional frame of the low-pass filter constructed according to the above equivalent circuit, it includes: a lower ground layer 50; an upper ground layer 51;

Page 9 M260882 IV. Creation instructions (5) Insulating ground 5 2; Left and right ground electrode plates 53, 54; Input electrode IN; Output electrode OUT; The input electrode IN is connected to the first lower layer winding plate 441, The first series inductor 44 composed of the penetration tube 442 and the first upper layer winding plate 443, wherein the first lower layer winding plate 441 is connected to the input electrode in and one end of the penetration tube 442, and the other end of the penetration tube 4 42 is Connected to the first upper layer winding plate 44 3, and the first upper layer winding plate 443 is connected to the loss pole adjustment inductor 48; the output electrode OUT is connected to the second lower layer winding plate 451, the through tube 452, and the second upper layer winding plate 453. The second series-connected inductor 45 is composed of the second lower layer winding plate 451. Do not connect the output electrode OUT and one end of the through tube 452; the other end of the through tube 452 is connected to the second upper layer winding 453 and the second upper layer. The winding plate 453 and the first upper layer winding plate 443 are connected to the contact point of the loss pole adjustment inductor 48 and the first series inductor 44; wherein the first series inductor 44 and the second series inductor 45 are in a three-dimensional structure. Belong to the same layer. The 4-battery pole adjustment inductor 48 is composed of a lower section penetrating tube 481, a lower transverse adjusting section 482, an upper section penetrating tube 483, and an upper transverse adjusting section 484. The positions of, 484 and the length of the upper and lower sections penetrate the lengths of the tubes 481 and 483, and are fine-tuned to the required inductance, so as to adjust the range of the injection loss poles between harmonics to achieve the best frequency suppression effect. The upper lateral adjustment section 4 8 4 is connected to the left and right ground electrode plates 53 and 54. The left and right ground electrode plates 53, 54 are connected to the input and output electrodes IN,

Page 10 M260882

OUT is parallel to each other and constitutes the first dissipative point adjustment capacitors 47. The input and output electrodes IN and the capacitor 43 to the ground. And the second loss is formed in parallel. The pumping pole adjustment capacitor 4 6 OUT is again connected to the upper ground layer 5 j. As shown in f 6, it is the simulated spectrum diagram of this creation;

The pole adjustment inductance 48 can be adjusted by adjusting the position of the upper section penetrating tube 483 in the upper U-direction adjustment sections 482 and 484 and the upper and lower section penetrating tubes 481 and 483 / degree 'to change the second injection loss pole 61, In this way, the expected chirp frequency can be injected due to the m2 injection loss poles 60, 6ι.

The relationship can be filtered through the low-pass filter 40, instead of the traditional low-pass filter as shown in figure j. 〇 You need to add an additional set of low-pass filters to achieve the cost. Purpose of good high frequency suppression effect. 1 «, α knows that the" harmonic suppression multilayer ceramic low-pass wave filter provided by this creation "not only has practical effects, but also a new design that has never been seen before. It has improved efficiency and progress. Therefore, it has already met the requirements of the new model of the Patent Law. To this end, the examiner would like to examine it in detail, and prayed for granting the patent as soon as possible. The creation has been described in detail above, but the above is only a preferred embodiment of the creation, and the scope of implementation of the creation cannot be limited. That is, all equal changes and modifications made in accordance with the scope of this creative application are

The M260882 diagram on page 11 simply explains that Figure 1A is the equivalent circuit diagram of a conventional low-pass filter; Figure 1B is a schematic diagram of the structure of Figure 1A; Figure 2 is the analog spectrum diagram of Figure 1A; Figure 3A is another equivalent low-pass filter equivalent circuit diagram; Figure 3B is an analog spectrum diagram of Figure 3A; Figure 4 is the equivalent circuit diagram of this creation; Figure 5 is the equivalent of this creation Architectural stereogram; Figure 6 is the simulated spectrum diagram of this creation. Description of drawing numbers: Summer 10 Low-pass ferrule 10, Low-pass filter 11 Input capacitor 12 First inductor 13 Second inductor 14 Ground capacitor 15 Output capacitor 16 First parallel capacitor 17 Second parallel capacitor 21 '22 Narrow transmission line 23 '24' 25 Wide microstrip line 30 Injection loss pole 40 Low-pass chirper 41 Input capacitance

Page 12 M260882

Brief description of drawings on page 13 42 Output capacitor 43 Capacitor to ground 44 First series inductor 441 First lower layer winding plate 442 through tube 443 Upper layer winding plate 45 Second series inductor 451 Second lower layer winding plate 452 through tube 453 The second upper layer winding plate 46 The first loss pole adjustment capacitor 47 The second loss pole adjustment capacitor 48 The loss pole adjustment inductor 481 The lower section through the tube 482 The lower section laterally adjusted 483 The upper section through the tube 484 The upper transverse adjustment section 50 The lower ground layer 51 The upper ground layer 52 Insulation ground 53 Left ground electrode plate 54 Right ground electrode plate 60 First injection loss pole 61 Second injection loss pole M260882

Page 14

Claims (1)

M260882 5. Scope of patent application 1. A low-pass filter, an input capacitor, an output capacitor, a pair of ground capacitors, and a first series connection; a wave filter, including 'connected to', 'connected to', connected to an inductor, and connected A second series inductance, connection sense; a first loss, a second loss, a loss pole, a loss fine adjustment loss, and each injection 2 · A low-pass filter ground layer on the ground layer left and right ground input electrodes, The output electrodes are looped from bottom to top, and the contact points are looped from bottom to top. The pole adjustment electrode point adjusts the electric adjustment inductance and the point capacitance can adjust the electric energy dissipation between the poles. There are: between the input end and the place; the output end Between the location and the loss pole adjustment inductor; connected to the wheel-in terminal and the loss pole adjustment capacitor to the output terminal and the loss pole adjustment capacitor, connected to the ground capacitor and the wheel-in terminal; and the capacitor, connected to the ground capacitor With rotation: It has a fine-tuning effect, cooperates with the first and adjusts two injection loss poles; inductive energy; variable injection loss • pole frequency: range. Includes: electrode plate; connected to the first series inductor, and Chu. T 嘁 and the first series Lei Xian pfe is connected to the loss pole adjustment inductor; connected to the second series inductor, and Chu Yi by The first series connection of Leixian is connected to the loss pole to adjust the inductance I 坌 '