LC filter
A technology of LC filters and resonators, which can be used in fixed structure capacitor combinations, transformer/inductor components, circuits, etc., and can solve problems such as difficulties in implementation
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment approach 1
[0040] figure 1 It is an equivalent circuit diagram of the bandpass filter 1 as an example of the LC filter of the first embodiment. Such as figure 1 As shown, the bandpass filter 1 includes input / output terminals P1, P2, LC parallel resonators LC1 to LC4, a capacitor C12, a capacitor C13, a capacitor C23, a capacitor C24, and a capacitor C34. Hereinafter, the wavelength corresponding to the operating frequency of the bandpass filter (for example, the center frequency of the passband) is defined as λ. In addition, the LC filter of the embodiment may also include an LC series resonator.
[0041] LC parallel resonator LC1 is connected to input / output terminal P1. LC parallel resonator LC4 is connected to input / output terminal P2. In addition, the LC parallel resonator LC1 may be indirectly connected to the input / output terminal P1 via an element such as an inductor or a capacitor. Similarly, the LC parallel resonator LC4 may be indirectly connected to the input / output termi...
Embodiment approach 2
[0130] Figure 18 It is an equivalent circuit diagram of the bandpass filter 2 as an example of the LC filter of the second embodiment. Figure 18 The equivalent circuit diagram shown is for figure 1 The shown equivalent circuit diagram has a configuration in which the capacitor C14 is added.
[0131] Such as Figure 18 As shown, capacitor C14 is connected between LC parallel resonators LC1 and LC4. Capacitor C14 represents the capacitive coupling of LC parallel resonators LC1 and LC4.
[0132] Figure 19 yes Figure 18 The perspective view of the appearance of the bandpass filter 2. Figure 20 is looking down from the Y-axis direction Figure 19 A diagram of the side SF22 of the bandpass filter 2. The equivalent circuit diagram of the bandpass filter 2 with figure 1 The equivalent circuit diagram shown is the same.
[0133] refer to Figure 19 as well as Figure 20 , the bandpass filter 2 is a laminate in which a plurality of dielectric layers are laminated in the...
Embodiment approach 3
[0159] Figure 24 It is an equivalent circuit diagram of the bandpass filter 3 as an example of the LC filter of the third embodiment. exist Figure 24 shown in the equivalent circuit diagram, from figure 1 In the shown equivalent circuit diagram, capacitor C24 is deleted, and LC parallel resonator LC5 and capacitors C14, C25, C35, and C45 are added. That is, five LC resonators are sequentially coupled to form a five-stage LC filter. Other than these are the same, so description will not be repeated.
[0160] Such as Figure 24 As shown, the LC parallel resonator LC5 is connected to the input and output terminal P2.
[0161] Capacitor C14 is connected between LC parallel resonators LC1 and LC4. Capacitor C14 represents the capacitive coupling of LC parallel resonators LC1 and LC4.
[0162] Capacitor C25 is connected between LC parallel resonators LC2 and LC5. Capacitor C25 represents capacitive coupling of LC parallel resonators LC2 and LC5.
[0163] Capacitor C35 is ...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More