CN212012647U - Antenna-shared radio frequency circuit and antenna device - Google Patents
Antenna-shared radio frequency circuit and antenna device Download PDFInfo
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- CN212012647U CN212012647U CN202020584243.5U CN202020584243U CN212012647U CN 212012647 U CN212012647 U CN 212012647U CN 202020584243 U CN202020584243 U CN 202020584243U CN 212012647 U CN212012647 U CN 212012647U
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Abstract
The utility model discloses an antenna sharing radio frequency circuit and an antenna device, wherein the antenna sharing radio frequency circuit comprises a 5.8G radio frequency circuit module and a 2.4G radio frequency circuit module; one end of the 5.8G radio frequency circuit module and one end of the 2.4G radio frequency circuit module are respectively electrically connected with the antenna; the other end of the 5.8G radio frequency circuit module is connected with a 5.8G port of the IC, and the other end of the 2.4G radio frequency circuit module is connected with a 2.4G port of the IC; the 2.4G radio frequency circuit module is used for passing 2.4G signals and blocking 5.8G signals from entering the IC from the 2.4G port; the 5.8G radio frequency circuit module is used for passing 5.8G signals and blocking 2.4G signals from entering the IC from the 5.8G port; the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are arranged separately. Through 5.8G radio frequency circuit module and 2.4G radio frequency circuit module discrete setting, the component position setting is adjustable among the antenna sharing radio frequency circuit, conveniently is arranged in the less equipment of volume, uses more in a flexible way, and 5.8G radio frequency circuit module and 2.4G radio frequency circuit module's separation sets up moreover, makes it finely tune, and application scope is wider.
Description
Technical Field
The utility model relates to an antenna field especially involves antenna sharing radio frequency circuit and electric wire apparatus.
Background
In the era of the rapid development of networks, people have taken the convenience brought by WIFI, and the coverage range of the WIFI is wider and wider: hotels, residential areas, airports, coffee shops and the like are everywhere and deeply extend into the lives of people. Along with the continuous update and the update of the technology, the simple 2.4G wifi can not meet the daily requirement of people along with the continuous improvement of the life quality of people.
The new technology such as 802.11a/ac/ax is applied more and more unconsciously, and two working frequency bands are used in most product designs: 2.4G and 5.8G are used for solving the long-distance conventional data transmission requirement and the short-distance high-definition video transmission requirement, and simultaneously improving the congestion of a transmission channel and the like; therefore, the wireless device which works in the 802.11a/b/g/n/ac/ax mode has the capability of simultaneously transmitting radio waves in two frequency bands; but wireless equipment is more and more extensive at present, and market competition is more and more intense; reducing equipment costs has become a major competitive weapon in the marketplace for manufacturers; therefore, a dual-band antenna is usually combined at the end of 2.4G and 5.8G rf circuits to reduce the cost and the space usage on the structure; in order to achieve the purpose, in the conventional practice in the industry, an integrated diplexer (antenna duplexer) is added in 2.4G and 5.8G radio frequency circuits to synthesize two paths of signals, and finally the signals are transmitted through a dual-frequency antenna; because the 2.4G and 5.8G frequency bands are far apart and are not frequency multiplication, the cost of the integrated diplexer is higher at present; and the finished product is not easy to be finely adjusted, so that the cost of the antenna shared radio frequency circuit is high, the application range is narrow, and the antenna shared radio frequency circuit is not flexible to use because the diplexer has a fixed volume and is not necessarily provided with enough space in a terminal with a small space.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an antenna sharing radio frequency circuit aims at solving the antenna sharing radio frequency circuit that current integrated antenna sharing ware leads to and uses inflexible technical problem.
The utility model provides an antenna shared radio frequency circuit, which comprises a 5.8G radio frequency circuit module and a 2.4G radio frequency circuit module; one end of the 5.8G radio frequency circuit module and one end of the 2.4G radio frequency circuit module are respectively electrically connected with the antenna; the other end of the 5.8G radio frequency circuit module is connected with a 5.8G port of the IC, and the other end of the 2.4G radio frequency circuit module is connected with a 2.4G port of the IC; the 2.4G radio frequency circuit module is used for passing 2.4G signals and blocking 5.8G signals from entering the IC from the 2.4G port; the 5.8G radio frequency circuit module is used for passing 5.8G signals and blocking 2.4G signals from entering the IC from the 5.8G port; the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are arranged separately.
Furthermore, the antenna also comprises a first inductor, wherein one end of the first inductor is used for being connected with the antenna, and the other end of the first inductor is connected with one ends of the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module.
Further, the 5.8G radio frequency circuit module comprises an LC filter circuit, a second inductor and a third inductor; one end of the LC filter circuit is electrically connected with the antenna; the other end of the LC filter circuit is connected with one end of a second inductor and one end of a third inductor, the other end of the second inductor is grounded, and the other end of the third inductor is connected with a 5.8G port of the IC; the LC filter circuit is used for filtering 5.8G signals, and the LC filter circuit and the third inductor are used for blocking 2.4G signals; the second inductor and the third inductor are used for matching the radio frequency impedance of the 5.8G signal.
Further, the LC filter circuit comprises a fourth inductor and a first capacitor; the fourth inductor is connected in parallel with the first capacitor.
Furthermore, the capacitance of the first capacitor is 0.8-1.2pF, and the inductance of the fourth inductor is 3.3-3.9 nH.
Further, the capacitance of the first capacitor is 1pF, and the inductance of the fourth inductor is 3.3 nH.
Further, the 2.4G radio frequency circuit module comprises a fifth inductor, a sixth inductor and a second capacitor; one end of the fifth inductor is electrically connected with the antenna; the other end of the fifth inductor is connected with one end of the sixth inductor and one end of the second capacitor respectively, the other end of the second capacitor is grounded, and the other end of the sixth inductor is connected with the 2.4G port of the IC; the fifth inductor, the sixth inductor and the second capacitor form a T-shaped circuit for filtering 2.4G signals; the fifth inductor is used for blocking 5.8G signals; the sixth inductor and the second capacitor are used for matching the radio frequency impedance of the 2.4G signal.
Further, the inductance of the fifth inductor is 5.65-6.8 nH.
Further, the inductance of the fifth inductor is 6.2 nH.
The application also provides an antenna device which comprises an antenna, an IC and the antenna sharing radio frequency circuit.
The beneficial effects of the utility model reside in that: the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are separately arranged, the position of components in the antenna shared radio frequency circuit can be adjusted, the antenna shared radio frequency circuit is convenient to use in equipment with a small size, the use is more flexible, the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are separately arranged, the antenna shared radio frequency circuit and the antenna device can be finely adjusted, and the application range of the antenna shared radio frequency circuit and the antenna device is wider; the antenna shared radio frequency circuit is separately arranged, so that the integration process is avoided, and the cost of the antenna shared radio frequency circuit is lower.
Drawings
Fig. 1 is a schematic diagram of an embodiment of an antenna-sharing rf circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating the gain of a fifth inductor in the embodiment of the present invention for a 5.8GHz frequency band signal when the inductance of the fifth inductor is 6.2 nH;
fig. 3 is a schematic diagram illustrating the gain condition of the fourth inductor for a 2.4GHz band signal when the inductance of the fourth inductor is 3.3 nH.
The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, the present invention provides an antenna-sharing rf circuit, which includes a 5.8G rf circuit module and a 2.4G rf circuit module; one end of the 5.8G radio frequency circuit module and one end of the 2.4G radio frequency circuit module are respectively electrically connected with the antenna; the other end of the 5.8G radio frequency circuit module is connected with a 5.8G port of the IC, and the other end of the 2.4G radio frequency circuit module is connected with a 2.4G port of the IC; the 2.4G radio frequency circuit module is used for passing 2.4G signals and blocking 5.8G signals from entering the IC from the 2.4G port; the 5.8G radio frequency circuit module is used for passing 5.8G signals and blocking 2.4G signals from entering the IC from the 5.8G port; the first inductor L806, the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are arranged separately.
When the IC transmits or receives a 2.4G signal, the 2.4G signal is filtered by the 2.4G radio frequency circuit module, the 2.4G signal is transmitted clearly, and the 5.8G radio frequency circuit module can block the 2.4G signal from passing through and reaching the IC; when the IC transmits or receives a 5.8G signal, the 5.8G signal is filtered by the 5.8G radio frequency circuit module, the transmission of the 5.8G signal is clear, and the 2.4G radio frequency circuit module can block the 5.8G signal from passing through and reaching the IC; thereby achieving the effect of preventing the energy emitted by the antenna from being reduced and avoiding the interference of the returned energy to the self.
Moreover, the first inductor L806, the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are separately arranged, so that the two frequency bands of 5.8G and 2.4G share one antenna; the position of components in the antenna shared radio frequency circuit is adjustable, the antenna shared radio frequency circuit is convenient to use in equipment with a small size, the use is more flexible, the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are separately arranged, the fine adjustment can be carried out, and the application range of the antenna shared radio frequency circuit and the antenna device is wider; the antenna shared radio frequency circuit is separately arranged, so that the integration process is avoided, and the cost of the antenna shared radio frequency circuit is lower.
In some embodiments, the antenna-shared rf circuit further includes a first inductor L806, one end of the first inductor L806 is used for connecting to the antenna, and the other end of the first inductor L806 is connected to one end of the 5.8G rf circuit module and one end of the 2.4G rf circuit module. The first inductor L806 can adjust the balance of the energy of the 2.4G signal and the 5.8G signal within the operating frequency band.
Further, in some embodiments, the 5.8G rf circuit block includes an LC filter circuit, a second inductance L805, and a third inductance L807; one end of the LC filter circuit is electrically connected with the antenna; the other end of the LC filter circuit is connected with one end of a second inductor L805 and one end of a third inductor L807, the other end of the second inductor L805 is grounded, and the other end of the third inductor L807 is connected with a 5.8G port of the IC; the LC filter circuit is used for filtering 5.8G signals, and the LC filter circuit and the third inductor L807 are used for blocking 2.4G signals; the second inductor L805 and the third inductor L807 are used to match the rf impedance of the 5.8G signal.
In this embodiment, one end of the LC filter circuit is connected to the other end of the first inductor L806, and one end of the LC filter circuit is electrically connected to the antenna through the first inductor L806.
The second inductor L805 and the third inductor L807 are convenient to adjust separately, and can be adjusted slightly according to different circuit environments, so that the 5.8G radio frequency circuit module is flexible to apply; when transmitting or receiving 5.8G signals, the 5.8G signals pass through the second inductor L805, the third inductor L807, the LC filter circuit and the first inductor L806, and the LC filter circuit performs a filtering function.
Further, in the present embodiment, the LC filter circuit includes a fourth inductor L804 and a first capacitor C817; the fourth inductor L804 is connected in parallel with the first capacitor C817; the first capacitor C817 and the fourth inductor L804 together form a stop band for 2.4G signals.
Further, the capacitance of the first capacitor C817 is 0.8-1.2pF, and the inductance of the fourth inductor L804 is 3.3-3.9 nH.
Further, in the present embodiment, the capacitance of the first capacitor C817 is 1pF, the inductance of the fourth inductor L804 is 3.3nH, the inductance of the second inductor L805 is 10nH, and the inductance of the third inductor L807 is 1.8 nH.
Referring to fig. 2, using inductor-capacitor resonance, the abscissa in the figure is the frequency band of the signal, the ordinate is the S21 parameter, S21 is the forward transmission coefficient, i.e. the gain condition, S21 is very small, which means that the signal energy cannot propagate, wherein the frequency of the point a is 2.40GHz, the frequency of the point B is 2.471GHz, it can be seen from the figure that when the inductance of the fourth inductor L804 is 3.3nH, the 2.4GHz band signal cannot pass through the fourth inductor L804, and the fourth inductor L804 can block the 2.4GHz band signal by using inductor-capacitor resonance.
Further, in this embodiment, the 2.4G rf circuit module includes a fifth inductor L802, a sixth inductor L801 and a second capacitor C802; one end of the fifth inductor L802 is electrically connected to the antenna; the other end of the fifth inductor L802 is connected to one end of the sixth inductor L801 and one end of the second capacitor C802, respectively, the other end of the second capacitor C802 is grounded, and the other end of the sixth inductor L801 is connected to the 2.4G port of the IC; the fifth inductor L802, the sixth inductor L801 and the second capacitor C802 form a T-type circuit for filtering 2.4G signals; the fifth inductor L802 is used to block 5.8G signals; the sixth inductor L801 and the second capacitor C802 are used for matching the rf impedance of the 2.4G signal.
In this embodiment, one end of the fifth inductor L802 is connected to the other end of the first inductor L806, and the fifth inductor L802 is electrically connected to the antenna through the first inductor L806.
The fifth inductor L802, the sixth inductor L801 and the second capacitor C802 are convenient to adjust in a discrete mode, and can be adjusted according to different circuit environments, so that the 2.4G radio frequency circuit module is flexible in application; when transmitting or receiving the 2.4G signal, the 2.4G signal passes through the fifth inductor L802, the sixth inductor L801 and the first inductor L806; the sixth inductor L801 is an inductor for 2.4G rf impedance matching, the second capacitor C802 is a small capacitor for implementing rf impedance matching, and the fifth inductor L802 uses the frequency response characteristic of its own component value as a stop band for 5.8G signals; the fifth inductor L802, the sixth inductor L801 and the second capacitor C802 form a T-shaped filtering and radio frequency matching circuit, and the radio frequency impedance requirement can be met by fine tuning a matching value; and meanwhile, the filter also has a great inhibiting effect on second harmonic. The radio frequency circuit design of the general certified products needs filters (filters and filters) to Filter out harmonic waves; the T-shaped matching circuit built by discrete components effectively realizes the function, thereby saving a Filter and further reducing the cost of products.
Further, in the present embodiment, the inductance of the fifth inductor L802 is 5.65-6.8 nH.
Further, preferably, the inductance of the fifth inductor L802 is 6.2nH, the capacitance of the second capacitor C802 is 0.5pF, and the inductance of the sixth inductor L801 is 8.2 nH.
Referring to fig. 3, by using the inductance natural vibration characteristic, the abscissa in the figure is the frequency band of the signal, the ordinate is the S21 parameter, S21 is the forward transmission coefficient, that is, the gain condition, S21 is very small, which means that the signal energy cannot propagate, wherein the frequency of the point C is 5.0GHz, the frequency of the point D is 6.14GHz, it can be seen from the figure that when the inductance of the fifth inductance L802 is 6.2nH, the 2.4GHz frequency band signal cannot pass through the fifth inductance L802, and the fifth inductance L802 can block the 5.8GHz frequency band signal by using the inductance natural vibration characteristic.
Further, in the present embodiment, the inductance of the first inductor L806 is 1 nH.
The principle of transmitting and receiving signals in this embodiment is as follows:
2.4G signal transmission: IC2.4G, the signal emitted from the port is filtered by the sixth inductor L801, the second capacitor C802 and the fifth inductor L802 and then directly transmitted from the first inductor L806 to the antenna end; the first capacitor C817 and the fourth inductor L804 form an LC filter circuit, and a low frequency stopband effect is formed by the frequency response of the material itself, so as to prevent the 2.4G signal from being transmitted back to the IC itself through the third inductor L807.
2.4G signal reception: after the 2.4G signal received by the antenna end passes through the first inductor L806, it enters the 2.4G RF pin of the IC from the fifth inductor L802, the second capacitor C802, and the sixth inductor L801, and then the signal processing is performed inside the IC. The first capacitor C817 and the fourth inductor L804 form an LC filter circuit that prevents the 2.4G signal from passing through the 5.8G RF matching path.
5.8G signal transmission: IC5.8G the signal is transmitted from the port through the third inductor L807, through the second inductor L805, through the first capacitor C817 and the fourth inductor L804 to the first inductor L806, and then transmitted through the antenna. The fifth inductor L802 prevents the 5.8G signal from propagating back to the IC itself through the 2.4G RF path by its frequency response characteristics.
5.8G signal reception: after passing through the first inductor L806, the 5.8G signal received by the antenna end passes through the second inductor L805 from the first capacitor C817 and the fourth inductor L804, and then enters the IC5.8G port through the third inductor L807, and then the signal processing is performed inside the IC. The fifth inductor L802 prevents the 5.8G signal from propagating back to the IC itself through the 2.4G RF path by its frequency response characteristics.
In the embodiment, the antenna sharing radio frequency circuit can effectively prevent 5.8G signals from entering the 2.4G circuit and transmitting signal energy back to the IC, so that the energy emitted by the antenna is low, and meanwhile, the interference of the transmitted energy to the IC is avoided; the circuit fully realizes the function of the antenna duplexer.
The application also provides an antenna device which comprises an antenna, an IC and the antenna sharing radio frequency circuit.
The beneficial effects of the utility model reside in that: through 5.8G radio frequency circuit module and 2.4G radio frequency circuit module discrete setting, the component position setting is adjustable among the antenna sharing radio frequency circuit, conveniently is arranged in the less equipment of volume, uses more in a flexible way, and 5.8G radio frequency circuit module and 2.4G radio frequency circuit module's separation sets up moreover, makes it finely tune, and antenna sharing radio frequency circuit and antenna device's application scope is wider.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. An antenna shared radio frequency circuit is characterized by comprising a 5.8G radio frequency circuit module and a 2.4G radio frequency circuit module; one end of the 5.8G radio frequency circuit module and one end of the 2.4G radio frequency circuit module are respectively electrically connected with an antenna; the other end of the 5.8G radio frequency circuit module is connected with a 5.8G port of the IC, and the other end of the 2.4G radio frequency circuit module is connected with a 2.4G port of the IC; the 2.4G radio frequency circuit module is used for passing 2.4G signals and blocking 5.8G signals from entering the IC from the 2.4G port; the 5.8G radio frequency circuit module is used for passing 5.8G signals and blocking 2.4G signals from entering the IC from the 5.8G port; the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module are arranged separately.
2. The antenna-shared radio frequency circuit according to claim 1, further comprising a first inductor, wherein one end of the first inductor is used for connecting an antenna, and the other end of the first inductor is connected to one ends of the 5.8G radio frequency circuit module and the 2.4G radio frequency circuit module.
3. The antenna-shared radio frequency circuit according to claim 1, wherein the 5.8G radio frequency circuit module comprises an LC filter circuit, a second inductor and a third inductor; one end of the LC filter circuit is electrically connected with the antenna; the other end of the LC filter circuit is connected with one end of the second inductor and one end of the third inductor, the other end of the second inductor is grounded, and the other end of the third inductor is connected with a 5.8G port of the IC; the LC filter circuit is used for filtering the 5.8G signal, and the LC filter circuit and the third inductor are used for blocking the 2.4G signal; the second inductor and the third inductor are used for matching the radio frequency impedance of the 5.8G signal.
4. The antenna-shared radio frequency circuit according to claim 3, wherein the LC filter circuit comprises a fourth inductor and a first capacitor; the fourth inductor is connected with the first capacitor in parallel.
5. The antenna-shared radio frequency circuit according to claim 4, wherein the capacitance of the first capacitor is 0.8-1.2pF, and the inductance of the fourth inductor is 3.3-3.9 nH.
6. The antenna-shared radio frequency circuit according to claim 5, wherein the capacitance of the first capacitor is 1pF, and the inductance of the fourth inductor is 3.3 nH.
7. The antenna-shared radio frequency circuit according to claim 1, wherein the 2.4G radio frequency circuit module comprises a fifth inductor, a sixth inductor and a second capacitor; one end of the fifth inductor is electrically connected with the antenna; the other end of the fifth inductor is connected with one end of the sixth inductor and one end of the second capacitor respectively, the other end of the second capacitor is grounded, and the other end of the sixth inductor is connected with a 2.4G port of the IC; the fifth inductor, the sixth inductor and the second capacitor form a T-shaped circuit for filtering the 2.4G signal; the fifth inductor is used for blocking the 5.8G signal; the sixth inductor and the second capacitor are used for matching the radio frequency impedance of the 2.4G signal.
8. The antenna-shared radio frequency circuit according to claim 7, wherein the inductance of the fifth inductor is 5.65-6.8 nH.
9. The antenna-shared radio frequency circuit according to claim 8, wherein an inductance of the fifth inductor is 6.2 nH.
10. An antenna arrangement comprising an antenna, an IC and an antenna sharing radio frequency circuit as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020584243.5U CN212012647U (en) | 2020-04-17 | 2020-04-17 | Antenna-shared radio frequency circuit and antenna device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020584243.5U CN212012647U (en) | 2020-04-17 | 2020-04-17 | Antenna-shared radio frequency circuit and antenna device |
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| CN212012647U true CN212012647U (en) | 2020-11-24 |
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| CN202020584243.5U Active CN212012647U (en) | 2020-04-17 | 2020-04-17 | Antenna-shared radio frequency circuit and antenna device |
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Address after: 518000 Room 601, block B, garden city digital building, 1079 Nanhai Avenue, Yanshan community, merchants street, Nanshan District, Shenzhen, Guangdong Patentee after: Shenzhen Nanfang Silicon Valley Semiconductor Co.,Ltd. Address before: 518000 room 501A, block B, huayuancheng digital building, 1079 Nanhai Avenue, Yuehai street, Nanshan District, Shenzhen City, Guangdong Province Patentee before: Shenzhen Southern Silicon Valley Semiconductor Co.,Ltd. |
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