LTCC-based double-path four-way power divider

Abstract

The utility model provides an LTCC (Low Temperature Co-Fired Ceramic)-based two-way four-way power divider, which is characterized by comprising a first metalized ground layer, a first LTCC substrate, a strip line layer power divider, a second LTCC substrate, a second metalized ground layer, a third LTCC substrate and a microstrip line layer power divider from bottom to top. The advantages of three-dimensional layout of the LTCC technology are combined, the low loss characteristic of the LTCC technology is applied, the layout structure of the two-way four-power divider based on the LTCC is achieved, the problem of signal cross layout is solved, and the good transmission characteristic is achieved.

Description

Technical Field

[0001] At least one embodiment of the utility model relates to the technical field of switch array radio frequency circuits, and in particular to a dual-path four-power divider based on LTCC. Background Art

[0002] With the rapid development of science and technology, the extensive application of wireless microwave communication systems, the emergence of large-scale ultra-large-scale integrated circuit technology and new electronic material technology, the requirements for radio frequency circuits are becoming increasingly higher. Radio frequency circuits are developing towards miniaturization, lightweight, and high reliability.

[0003] In wireless microwave communication systems, switch arrays are very important RF circuits. Due to the different front-end structures of the systems, the customization requirements of switch arrays are also very high. The dual-channel four-power divider is the key link in the design of switch array circuits. In view of the problem that the dual-channel input and eight-channel output of the switch array RF circuit require a cross layout, the surface microstrip circuit of traditional materials cannot achieve a cross layout. Utility Model Content

[0004] Based on the above problems, the utility model provides a dual-path four-power divider based on LTCC, characterized in that it includes, from bottom to top: a first metallized layer, a first LTCC substrate, a stripline layer power divider, a second LTCC substrate, a second metallized layer, a third LTCC substrate, and a microstrip line layer power divider.

[0005] According to an embodiment of the utility model, the microstrip line layer power divider is arranged on the surface of the third LTCC substrate, and the microstrip line layer power divider includes an input circuit, two primary output branches, and four secondary output branches connected in sequence; the input circuit is connected to the first input port; two primary output branches are separated from the input circuit, and each of the primary output branches is respectively provided with two secondary output branches, and the end of each secondary output branch corresponds to a first output port.

[0006] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between the two primary output branches of the microstrip line layer power divider.

[0007] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between two secondary output branches respectively corresponding to each of the primary output branches in the microstrip line layer power divider.

[0008] According to an embodiment of the utility model, the stripline layer power divider is arranged between the first LTCC substrate and the second LTCC substrate, and the stripline layer power divider includes an input circuit, two primary output branches, and four secondary output branches connected in sequence; two primary output branches are divided from the input circuit, and each of the primary output branches is respectively provided with two secondary output branches; the input circuit is connected to the second input port provided on the third LTCC substrate through a metallized via; and the end of each secondary output branch is connected to the second output port provided on the third LTCC substrate through a metallized via.

[0009] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between the two primary output branches of the stripline layer power divider.

[0010] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between two secondary output branches respectively corresponding to each of the primary output branches in the stripline layer power divider.

[0011] According to an embodiment of the present invention, the first LTCC substrate and the second LTCC substrate are constructed into a four-layer structure.

[0012] According to the embodiment of the present invention, the third LTCC substrate is constructed into a three-layer structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 The hierarchical structure diagram of the LTCC-based dual-path four-power divider of the embodiment of the utility model is schematically shown.

[0014] Figure 2 It is a schematic diagram of the three-dimensional structure of a LTCC-based dual-channel four-power divider according to an embodiment of the utility model.

[0015] Figure 3a Schematic diagram of the transmission characteristic curve of the microstrip line layer power divider according to an embodiment of the utility model.

[0016] Figure 3b 1 is the transmission characteristic of the stripline layer power divider according to the embodiment of the utility model.

[0017] It should be noted that, for the sake of clarity, in the drawings used to describe the embodiments of the present invention, the sizes of structures or regions may be enlarged or reduced, that is, these drawings are not drawn according to the actual scale. DETAILED DESCRIPTION

[0018] In order to solve the problem that the dual-channel four-power divider in the current communication switch array system cannot be parallel and staggered, the utility model applies LTCC (Low Temperature Co-fired Ceramic) technology, combines the advantages of its three-dimensional layout, and applies its low loss characteristics to realize the layout structure of the dual-channel four-power divider based on LTCC, solves the problem of signal cross layout, and realizes good transmission characteristics.

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings. The following description of at least one exemplary embodiment is actually only illustrative and is by no means a limitation on the utility model and its application or use. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without carrying out creative work are within the scope of protection of the utility model.

[0020] The utility model provides a dual-channel four-power divider based on LTCC, combined with Figure 1 and Figure 2 As shown, the dual-path four-way power divider includes from bottom to top: a first metallized layer, a first LTCC substrate, a stripline layer power divider, a second LTCC substrate, a second metallized layer, a third LTCC substrate, and a microstrip layer power divider.

[0021] According to an embodiment of the utility model, a microstrip line layer power divider is arranged on the surface of the third LTCC substrate, and the microstrip line layer power divider includes an input circuit, two primary output branches, and four secondary output branches connected in sequence; the input circuit of the microstrip line layer power divider is connected to the first input port; two primary output branches are divided from the input circuit, and each of the primary output branches is respectively provided with two secondary output branches, and the end of each secondary output branch corresponds to a first output port, and a total of 4 first output ports are provided.

[0022] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between the two primary output branches of the microstrip line layer power divider.

[0023] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between two secondary output branches respectively corresponding to each of the primary output branches in the microstrip line layer power divider.

[0024] According to an embodiment of the utility model, the stripline layer power divider is arranged between the first LTCC substrate and the second LTCC substrate, and the stripline layer power divider includes an input circuit, two primary output branches, and four secondary output branches connected in sequence; two primary output branches are divided from the input circuit, and each of the primary output branches is respectively provided with two secondary output branches; the input circuit is connected to the second input port provided on the third LTCC substrate through a metallized via; and the end of each secondary output branch is connected to the second output port provided on the third LTCC substrate through a metallized via.

[0025] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between the two primary output branches of the stripline layer power divider.

[0026] According to an embodiment of the utility model, a 100-ohm isolation resistor is integrated between two secondary output branches respectively corresponding to each of the primary output branches in the stripline layer power divider.

[0027] According to an embodiment of the present invention, the first LTCC substrate and the second LTCC substrate are constructed into a four-layer structure.

[0028] According to the embodiment of the present invention, the third LTCC substrate is constructed into a three-layer structure.

[0029] The utility model introduces a dual-channel four-power divider layout structure, which has good in-band transmission performance. The microstrip line layer power divider adopts a Wilkinson power division structure, and then divides the power into two and then divides the power into two, forming a four-channel power divider structure, including a first input port and four first output ports; multiple 100 ohm resistors are integrated between the output branches of the microstrip line layer power divider to achieve good isolation effect. The microstrip line layer power divider is arranged on a third LTCC substrate formed by three layers of Ferro A6M LTCC material.

[0030] The other four-power-dividing structure is a stripline layer power divider, including one second input port and four second output ports, which are all led out at the microstrip layer power divider through metallized vias. The signal is transmitted from the second input port at the microstrip layer power divider to the stripline layer through the metallized vias, and then the output signal is output from the four second output ports set at the microstrip layer power divider through the metallized vias; the metallized vias can ensure a good shielding effect for signal transmission. The first LTCC substrate and the second LTCC substrate are respectively 4 layers of Ferro A6M LTCC materials as the medium of the stripline layer power divider, and a 100 ohm resistor is integrated in the four-power divider to achieve a good isolation effect.

[0031] The dual four-power divider layout structure of the utility model solves the problem of cross arrangement of output terminal signals and realizes a miniaturized dual-channel four-power divider layout structure. Figure 3a and Figure 3b As shown, by simulating the transmission characteristics of the microstrip layer power divider and the stripline layer power divider, it can be seen that the output branch simulation results corresponding to the microstrip layer power divider and the stripline layer power divider respectively have good transmission characteristics and meet the system usage requirements.

[0032] So far, the embodiments of the utility model have been described in detail in conjunction with the accompanying drawings. It should be noted that the implementation methods not shown or described in the drawings or the body of the specification are all forms known to ordinary technicians in the relevant technical field and are not described in detail. In addition, the above definitions of each element and method are not limited to the various specific structures, shapes or methods mentioned in the embodiments, and ordinary technicians in the field can simply change or replace them.

[0033] According to the above description, those skilled in the art should have a clear understanding of the LTCC-based dual-channel four-power divider of the present invention.

[0034] In summary, the utility model provides a dual-channel four-power divider based on LTCC, whose layout structure not only solves the problem of cross-layout of switch array signals and limited volume, but also has broadband low-loss transmission performance, and also has the characteristics of miniaturization and lightweight. By utilizing the advantages of LTCC three-dimensional circuit design, an embedded layout transmission structure is realized, and experiments have proved the accuracy of electromagnetic simulation.

[0035] It should also be noted that the directional terms mentioned in the embodiments, such as "upper", "lower", "front", "back", "left", "right", etc., are only reference directions of the drawings and are not intended to limit the scope of protection of the present invention. Throughout the drawings, the same elements are represented by the same or similar reference numerals. Conventional structures or constructions will be omitted when they may cause confusion in the understanding of the present invention. In addition, the shapes and sizes of the components in the drawings do not reflect the actual size and proportion, but only illustrate the contents of the embodiments of the present invention.

[0036] The ordinal numbers used in the specification and claims, such as "first", "second", "third", etc., to modify the corresponding elements, do not themselves mean that the elements have any ordinal numbers, nor do they represent the order of one element and another element, or the order in the manufacturing method. The use of these ordinal numbers is only used to clearly distinguish a component with a certain name from another component with the same name.

[0037] In addition, unless the steps are specifically described or must occur in sequence, the order of the above steps is not limited to the above list, and can be changed or rearranged according to the required design. And the above embodiments can be mixed and matched with each other or with other embodiments based on design and reliability considerations, that is, the technical features in different embodiments can be freely combined to form more embodiments.

[0038] Those skilled in the art can understand that the embodiments described above are exemplary and can be improved by those skilled in the art. The structures described in various embodiments can be freely combined without causing conflicts in structure or principle.

[0039] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A dual-channel four-power divider based on LTCC, characterized in that: From bottom to top, it includes: a first metallized layer, a first LTCC substrate, a stripline layer power divider, a second LTCC substrate, a second metallized layer, a third LTCC substrate, and a microstrip layer power divider.

2. The LTCC-based dual-channel four-power divider according to claim 1, characterized in that: The microstrip line layer power divider is arranged on the surface of the third LTCC substrate, and the microstrip line layer power divider includes an input circuit, two primary output branches, and four secondary output branches connected in sequence; The input circuit is connected to the first input port; two primary output branches are divided from the input circuit, each of the primary output branches is respectively provided with two secondary output branches, and the end of each secondary output branch corresponds to a first output port.

3. The LTCC-based dual-channel four-power divider according to claim 2, characterized in that: A 100-ohm isolation resistor is integrated between the two primary output branches of the microstrip line layer power divider.

4. The LTCC-based dual-channel four-power divider according to claim 2, characterized in that: A 100-ohm isolation resistor is integrated between the two secondary output branches respectively corresponding to each of the primary output branches in the microstrip line layer power divider.

5. The LTCC-based dual-channel four-power divider according to claim 1, characterized in that: The stripline layer power divider is arranged between the first LTCC substrate and the second LTCC substrate, and the stripline layer power divider includes an input circuit, two primary output branches, and four secondary output branches connected in sequence; Two primary output branches are divided from the input circuit, and each primary output branch is respectively provided with two secondary output branches; The input circuit is connected to a second input port provided on the third LTCC substrate through a metallized via; The end of each secondary output branch is connected to the second output port arranged on the third LTCC substrate through a metallized via.

6. The LTCC-based dual-channel four-power divider according to claim 5, characterized in that: A 100-ohm isolation resistor is integrated between the two primary output branches of the stripline layer power divider.

7. The LTCC-based dual-channel four-power divider according to claim 5, characterized in that: A 100-ohm isolation resistor is integrated between two secondary output branches corresponding to each of the primary output branches in the stripline layer power divider.

8. The LTCC-based dual-channel four-power divider according to any one of claims 1 to 7, characterized in that: The first LTCC substrate and the second LTCC substrate are constructed into a 4-layer structure.

9. The LTCC-based dual-channel four-power divider according to any one of claims 1 to 7, characterized in that: The third LTCC substrate is constructed into a 3-layer structure.

Images