Navigation antenna signal and 4G antenna signal miniaturized combiner and antenna unit

Abstract

The application relates to a navigation antenna signal and 4G antenna signal miniaturized combiner, which comprises a dielectric substrate, one side of the dielectric substrate is provided with a metal ground plate, and the other side of the dielectric substrate is provided with a microstrip circuit, the microstrip circuit comprises a band-pass filter, a band-stop filter, a direct current passage and a combiner module. The band-pass filter is realized by using a multimode resonator. The band-stop filter is realized by using a lumped filter. The direct current passage is connected with the input end of the band-pass filter. The combiner module comprises a first output feed line, a second output feed line and an input feed line; one end of the first output feed line and one end of the second output feed line are connected with one end of the input feed line; the other end of the first output feed line is connected with the output end of the band-pass filter and the other end of the direct current passage; and the other end of the second output feed line is connected with the output end of the band-stop filter. The band-pass filter is realized by using a multimode resonator, the volume of the combiner is greatly reduced, the combiner has the advantages of high performance, and the combiner meets the combiner demand of the navigation antenna signal and the 4G antenna signal.

Description

Technical Field

[0001] This invention relates to the field of combining and splitting devices for radio frequency signals, and in particular to a miniaturized combiner and antenna unit for navigation antenna signals and 4G antenna signals. Background Technology

[0002] With the advancement of communication technology, global positioning and communication systems (GPS) have been widely applied in various fields. Currently, GPS operates in the 1574.397MHz-1576.443MHz frequency band, the BeiDou Navigation Satellite System operates in the 1558.854MHz-1563.046MHz frequency band, the GLONASS Navigation Satellite System operates in the 1598.0625MHz-1605.375MHz frequency band, and the Galileo Navigation Satellite System operates in the 1559-1592MHz frequency band. To combine navigation antenna signals with 4G antenna signals, a combiner is required. However, current combiners for navigation and 4G antenna signals are generally large in size, which cannot meet the needs of multi-system antenna applications and urgently requires improvement. Summary of the Invention

[0003] Therefore, it is necessary to provide a miniaturized combiner and antenna unit for navigation antenna signals and 4G antenna signals, addressing the technical problem that current combiners on the market are generally large in size and cannot meet the needs of multi-system antennas.

[0004] This invention proposes a miniaturized combiner for navigation antenna signals and 4G antenna signals, comprising a dielectric substrate, a metal ground plane on one side of the dielectric substrate, and a microstrip circuit on the other side, wherein the microstrip circuit includes:

[0005] The bandpass filter is implemented using a multimode resonator.

[0006] The band-stop filter employs a lumped filter.

[0007] A DC path, one end of which is connected to the input of a bandpass filter;

[0008] The combining module includes a first output feed line, a second output feed line, and an input feed line; one end of the first output feed line and the second output feed line are both connected to one end of the input feed line, the other end of the first output feed line is connected to the output terminal of the bandpass filter and the other end of the DC path, and the other end of the second output feed line is connected to the output terminal of the bandstop filter.

[0009] In a preferred embodiment of the present invention, the bandpass filter includes a parallel coupled input feed line, a parallel coupled output feed line, and a stepped impedance line. The two ends of the stepped impedance line are respectively connected to one end of the parallel coupled input feed line and one end of the parallel coupled output feed line, and the other end of the parallel coupled output feed line is connected to the first output feed line. A first grounding via is provided on the stepped impedance line.

[0010] In a preferred embodiment of the present invention, the band-stop filter includes a first patch capacitor, a first microstrip inductor, a first microstrip capacitor, and a second microstrip capacitor. The first microstrip inductor is connected to a second output feed line. The first patch capacitor and the first microstrip capacitor are both located at the connection point between the first microstrip inductor and the second output feed line. The second microstrip capacitor is connected to the first microstrip inductor, and a first patch inductor is provided at the connection point. A second grounding via is provided on the second microstrip capacitor.

[0011] In a preferred embodiment of the present invention, the DC path includes a second microstrip inductor line, the two ends of the second microstrip inductor line being connected to a first output feed line and a parallel coupled input feed line respectively, and a second patch inductor is provided at both ends of the second microstrip inductor line.

[0012] In a preferred embodiment of the present invention, a second surface-mount capacitor is provided at one end of the second output feed line near the input feed line.

[0013] In a preferred embodiment of the present invention, the passband of the bandpass filter is 1550-1610MHz.

[0014] In a preferred embodiment of the present invention, the stopband of the band-stop filter circuit is 1550-1610MHz.

[0015] In a preferred embodiment of the present invention, the dielectric substrate is made of F4B material.

[0016] In a preferred embodiment of the present invention, the metal base plate is a copper-clad laminate.

[0017] The present invention also proposes an antenna unit, including a navigation antenna and a 4G antenna, and further including a miniaturized combiner for the navigation antenna signal and the 4G antenna signal as described above, wherein the input terminals of the navigation antenna and the 4G antenna are connected to the input terminals of a bandpass filter and a bandstop filter, respectively.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The bandpass filter circuit of this invention is implemented using a multimode resonator, which greatly reduces the size of the filter. The frequency can reach 1550MHz-1610MHz, which meets the requirements of combining navigation antenna signals and 4G antenna signals. It is easy to process, low in cost, suitable for mass production and easy to install, and can be used in modern communication systems. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a miniaturized combiner for navigation antenna signals and 4G antenna signals proposed in this embodiment;

[0021] Figure 2 The S-parameter diagram of the bandpass filter in the embodiment;

[0022] Figure 3 The S-parameter diagram of the band-stop filter in the embodiment;

[0023] Figure 4 The S-parameter diagrams of the bandpass filter and bandstop filter in the combiner of the embodiment are shown. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Reference Figure 1 This embodiment proposes a miniaturized combiner for navigation antenna signals and 4G antenna signals, including a dielectric substrate made of F4B material. One side of the dielectric substrate is provided with a metal ground plane formed by copper clad laminate and the other side is provided with a microstrip circuit. The microstrip circuit includes a bandpass filter 1, a bandstop filter 2, a DC path 3 and a combiner module 4.

[0026] The combiner module 4 has a T-shaped structure, including a first output feed line 41, a second output feed line 42, and an input feed line 43. The first output feed line 41 and the second output feed line 42 are both connected to the input feed line 43, and a second surface-mount capacitor 44 is provided at the end of the second output feed line 42 near the input feed line 43.

[0027] The bandpass filter 1 is implemented using a multimode resonator. The passband characteristics of a multimode resonator can be independently adjusted, and its circuit size is small. Filters designed with multimode resonators have the advantages of saving space and low insertion loss. The bandpass filter 1 includes a parallel-coupled input feed line 11, a parallel-coupled output feed line 12, and a stepped impedance line 13. Both ends of the stepped impedance line 13 are connected to one end of the parallel-coupled input feed line 11 and one end of the parallel-coupled output feed line 12, respectively. A first grounding via 14 is provided on the stepped impedance line 13. The other end of the parallel-coupled output feed line 12 is connected to the other end of the first output feed line 41. The parallel-coupled input feed line 11, the parallel-coupled output feed line 12, the stepped impedance line 13, and the first grounding via 14 determine the performance indicators of the bandpass filter, including the passband frequency, passband bandwidth, zero point, and passband insertion loss. (Refer to...) Figure 2As can be seen, the passband is between 1550-1610MHz, and the performance of passband filter 1 in this embodiment is well demonstrated.

[0028] The band-stop filter 2 is a lumped filter with a passband of 1550-1610MHz. The band-stop filter 2 includes a first surface-mount capacitor 21, a first microstrip inductor 22, a first microstrip capacitor 23, and a second microstrip capacitor 24. The first microstrip inductor 22 is connected to the second output feed line 42. The second surface-mount capacitor 44 acts as a DC blocking element, preventing DC from passing through the band-stop filter 2. The first surface-mount capacitor 21 and the first microstrip capacitor 23 are both located at the connection point between the first microstrip inductor 22 and the second output feed line 42. The second microstrip capacitor 24 is connected to the first microstrip inductor 22, and a first surface-mount inductor 25 is located at the connection point. A second grounding via 25 is located on the second microstrip capacitor 24. The first surface-mount capacitor 21 and the first surface-mount inductor 25 determine the performance specifications of the band-stop filter 2, including the stopband frequency and stopband bandwidth. Figure 3 It can be seen that the frequency band outside 1550-1610MHz is the passband, thus achieving the performance of bandstop filter 2 very well.

[0029] The DC path 3 can only pass DC signals to power the navigation antenna signal amplifier. The DC path 3 includes a second microstrip inductor 31, the two ends of which are connected to the first output feed line 41 and the parallel coupled input feed line 11, respectively, and a second patch inductor 32 is provided at both ends of the second microstrip inductor 31.

[0030] Reference Figure 4 In this embodiment, the combiner allows 4G signals and navigation signals in the 1550-1610MHz range to pass through, thus achieving the performance of the combiner very well.

[0031] In this embodiment, the frequency can reach 1550MHz-1610MHz, which meets the requirements for combining navigation antenna signals and 4G antenna signals. The bandpass filter circuit is implemented using a multimode resonator, which greatly reduces the size of the filter. It is easy to process, low in cost, suitable for mass production, and easy to install. It can be used in modern communication systems.

[0032] Based on the aforementioned miniaturized combiner for navigation antenna signals and 4G antenna signals, this embodiment also introduces an antenna unit, including a navigation antenna and a 4G antenna, and further including the aforementioned miniaturized combiner for navigation antenna signals and 4G antenna signals. The navigation antenna and the 4G antenna are respectively connected to the input terminals of the combiner's bandpass filter 1 and bandstop filter 2.

[0033] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0034] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of this invention patent should be determined by the appended claims.

Claims

1. A miniaturized combiner for navigation antenna signals and 4G antenna signals, comprising a dielectric substrate, wherein a metal base plate is disposed on one side of the dielectric substrate and a microstrip circuit is disposed on the other side thereof, characterized in that, The microstrip circuit includes: The bandpass filter (1) is implemented using a multimode resonator; A DC path (3) is connected at one end to the input of a bandpass filter (1); The combining module (4) includes a first output feed line (41), a second output feed line (42), and an input feed line (43); the first output feed line (41) and the second output feed line (42) are both connected to the input feed line (43); the first output feed line (41) is connected to the output terminal of the bandpass filter (1) and the other end of the DC path (3); the second output feed line (42) is connected to the output terminal of the bandstop filter (2); a second surface-mount capacitor (44) is provided on the end of the second output feed line (42) near the input feed line (43). The band-stop filter (2) adopts a lumped filter; the band-stop filter (2) includes a first patch capacitor, a first microstrip inductor, a first microstrip capacitor and a second microstrip capacitor. The first microstrip inductor is connected to the second output feed line (42). The first patch capacitor and the first microstrip capacitor are both located at the connection position between the first microstrip inductor and the second output feed line (42). The second microstrip capacitor is connected to the first microstrip inductor and a first patch inductor is provided at the connection point. A second grounding via is provided on the second microstrip capacitor.

2. The miniaturized combiner for navigation antenna signals and 4G antenna signals according to claim 1, characterized in that, The bandpass filter (1) includes a parallel coupled input feed line (11), a parallel coupled output feed line (12), and a stepped impedance line (13). The two ends of the stepped impedance line (13) are connected to the parallel coupled input feed line (11) and the parallel coupled output feed line (12) respectively. The parallel coupled output feed line (12) is connected to the first output feed line (41). A first grounding via (14) is provided on the stepped impedance line (13).

3. The miniaturized combiner for navigation antenna signals and 4G antenna signals according to claim 2, characterized in that, The DC path (3) includes a second microstrip inductor (31), the two ends of which are connected to the first output feed line (41) and the parallel coupled input feed line (11) respectively, and a second patch inductor (32) is provided at both ends of the second microstrip inductor (31).

4. The miniaturized combiner for navigation antenna signals and 4G antenna signals according to claim 1, characterized in that, The passband of the bandpass filter (1) is 1550-1610MHz.

5. The miniaturized combiner for navigation antenna signals and 4G antenna signals according to claim 1, characterized in that, The stopband of the band-stop filter is 1550-1610MHz.

6. The miniaturized combiner for navigation antenna signals and 4G antenna signals according to claim 1, characterized in that, The dielectric substrate is made of F4B material.

7. The miniaturized combiner for navigation antenna signals and 4G antenna signals according to claim 1, characterized in that, The metal base plate is a copper-clad laminate.

8. An antenna element comprising a navigation antenna and a 4G antenna, characterized in that, It also includes a miniaturized combiner for navigation antenna signals and 4G antenna signals as described in any one of claims 1-7, wherein the navigation antenna and the 4G antenna are respectively connected to the input terminals of the bandpass filter (1) and the bandstop filter (2).

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