CN114069236A - Tuning system, tuning method and electronic equipment - Google Patents
Tuning system, tuning method and electronic equipment Download PDFInfo
- Publication number
- CN114069236A CN114069236A CN202111382388.2A CN202111382388A CN114069236A CN 114069236 A CN114069236 A CN 114069236A CN 202111382388 A CN202111382388 A CN 202111382388A CN 114069236 A CN114069236 A CN 114069236A
- Authority
- CN
- China
- Prior art keywords
- tuning
- impedance
- aperture
- tuner
- antenna radiator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 claims abstract description 13
- 230000003044 adaptive effect Effects 0.000 claims abstract description 4
- 239000003990 capacitor Substances 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 5
- 230000006978 adaptation Effects 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/002—Protection against seismic waves, thermal radiation or other disturbances, e.g. nuclear explosion; Arrangements for improving the power handling capability of an antenna
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/24—Supports; Mounting means by structural association with other equipment or articles with receiving set
- H01Q1/241—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM
- H01Q1/242—Supports; Mounting means by structural association with other equipment or articles with receiving set used in mobile communications, e.g. GSM specially adapted for hand-held use
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/52—Means for reducing coupling between antennas; Means for reducing coupling between an antenna and another structure
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q23/00—Antennas with active circuits or circuit elements integrated within them or attached to them
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
- Details Of Aerials (AREA)
- Transceivers (AREA)
Abstract
The invention discloses a tuning system, a tuning method and electronic equipment, wherein the tuning system comprises an antenna radiator, a feed source and an aperture tuner, an impedance tuner and a detection control module, wherein the feed source and the aperture tuner are coupled to the antenna radiator; the impedance tuner is coupled to a feed point of the antenna radiator, and the detection control module detects the RSSI of the antenna radiator and controls the on-off of the impedance tuner and the impedance tuning adaptive value according to the detection result of the RSSI. The invention ensures the performance of the antenna in a free space state by an aperture tuning mode, and enables the antenna signal of the electronic equipment in a normal standby state to keep an optimal state; the impedance tuning mode can be triggered by detecting the RSSI and works simultaneously with the aperture tuning mode, and the impedance tuning mode can effectively reduce the reduction of the antenna performance caused by holding by hand or approaching human head to the electronic equipment. The invention allows to compromise the best performance of the antenna in two states (free space, hand-held or close to the head).
Description
Technical Field
The present invention relates to the field of wireless communication technologies, and in particular, to a tuning system, a tuning method, and an electronic device.
Background
With the rapid development of mobile terminals, smart phones and the like are electronic devices that are necessary for people, conversation and internet access are the most important and basic functions of smart phones, the experience of conversation and internet access depends on the strength of signals, the strength of signals depends on the strength and the difference of antenna performance, and during conversation and internet access, the antenna performance is affected by being held by hands or being close to the head, but the electronic devices cannot be affected by the antenna performance in a Free Space (FS) state.
Although the antenna can be adjusted in performance by means of antenna aperture tuning and antenna impedance tuning, it still cannot be compatible with optimal performance in both states (free space and hand-held or near-head), and therefore it is necessary to provide a method for compatibility between the antenna performance in both states.
Disclosure of Invention
The invention provides a tuning system, a tuning method and electronic equipment, which can ensure the performance of an antenna in a free space state and can effectively reduce the performance reduction caused by the antenna being held by hands or being close to the head.
The purpose of the invention is realized by the following technical scheme:
a tuning system comprising an antenna radiator and a feed and aperture tuner coupled to the antenna radiator; the device is characterized by also comprising an impedance tuner and a detection control module; the impedance tuner is coupled to a feed point of the antenna radiator, and the detection control module detects the RSSI of the antenna radiator and controls the on-off of the impedance tuner and the impedance tuning adaptive value according to the detection result of the RSSI.
Preferably, the antenna radiator is grounded through a metal connection portion.
Preferably, an antenna matching circuit is disposed between the antenna radiator and the feed source.
Preferably, the aperture tuner includes at least two aperture tuning lines and an aperture tuning controllable switch for disconnecting or selectively coupling the at least two aperture tuning lines to the antenna radiator.
Preferably, the impedance tuner includes at least two impedance tuning lines and an impedance tuning controllable switch for disconnecting the at least two impedance tuning lines or selectively coupling the at least one impedance tuning line to a feed point of the antenna radiator.
Preferably, the aperture tuning line comprises a direct-connection line, or a grounded capacitor, or a grounded inductor, or a grounded serial capacitor and inductor; the impedance tuning circuit comprises a direct connection circuit, or a grounded capacitor, or a grounded inductor, or a grounded series capacitor and inductor.
An electronic device, characterized in that it comprises a tuning system as described above.
A method of tuning, comprising:
(1) detecting the RSSI of an antenna radiator, judging whether the variation amplitude of the RSSI within a preset time t is greater than or equal to a preset value S1, if so, entering the step (2a), otherwise, entering the step (2 b);
(2a) respectively carrying out aperture tuning operation and impedance tuning operation on the antenna radiator through an aperture tuner and an impedance tuner;
(2b) and carrying out aperture tuning on the antenna radiator through the aperture tuner.
Preferably, when the variation amplitude of the RSSI is greater than or equal to the predetermined value S1 within a predetermined time t, different impedance tuning adaptation values are configured for the impedance tuning operation according to different intervals in which the variation amplitude is located.
Preferably, the larger the magnitude of the change, the larger the capacitance value and the smaller the inductance value of the impedance tuning operation configuration.
The invention has the beneficial effects that: the performance of the antenna in a free space state is ensured through an aperture tuning mode, and an antenna signal of the electronic equipment in a normal standby state is kept in an optimal state; in addition, the impedance tuning mode can be triggered by detecting the RSSI and works simultaneously with the aperture tuning mode, and the impedance tuning mode can effectively reduce the reduction of the antenna performance caused by holding by hands or approaching human heads to the electronic equipment. From the above, the present invention can compromise the best performance of the antenna in two states (free space, handheld or near head).
Drawings
Fig. 1 is a schematic structural diagram of a tuning system applied to a mobile phone according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of an equivalent circuit of a tuning system according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a tuning method according to an embodiment of the present invention.
Fig. 4 is a route chart of the tuning method applied to the first mode and the second mode according to the embodiment of the present invention.
Description of reference numerals: 01-a feed source; 11-an impedance tuner; 12-an aperture tuner; 21-an antenna matching circuit; 31-an antenna radiator; 41-metal connection.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The use of the term "including" in the present invention is an open-ended term that should be interpreted to mean "including, but not limited to"; additionally, the term "coupled" is used herein to include any direct or indirect connection.
As shown in fig. 1 and fig. 2, the present embodiment provides a tuning system, which can be applied to an electronic device such as a mobile phone, and the tuning system includes an antenna radiator 31, an antenna matching circuit 21, a feed 01, an impedance tuner 11, an aperture tuner 12, a detection control module 13, and a metal connection portion 41.
The antenna radiator 31 is coupled to the feed 01 via an antenna matching circuit 21, and the antenna matching circuit 21 generally includes an equivalent series device Z (e.g., a capacitor) and an equivalent parallel device Y (e.g., an inductor); the aperture tuner 12 is coupled to the antenna radiator 31, and the antenna radiator 31 is grounded through a metal connection 41, which are related to the prior art and will not be described herein. The following description focuses on the arrangement of the impedance tuner 11 and the detection control module 13:
the impedance tuner 11 is coupled to a feed point of the antenna radiator 31, and the detection control module 13 detects an RSSI (Received Signal Strength Indicator) of the antenna radiator, and controls the on/off of the impedance tuner and an impedance tuning adaptation value of the impedance tuner according to a detection result of the RSSI.
As shown in fig. 2, the aperture tuner 12 includes four aperture tuning lines and an aperture tuning controllable switch (see the arrow in the dashed box identifying the aperture tuner 12 in fig. 2) that disconnects or selectively couples at least two of the aperture tuning lines to the antenna radiator. More specifically, the aperture tuning lines include a direct-connection line, or a grounded capacitor, or a grounded inductor, or a grounded serial capacitor and inductor, and the four aperture tuning lines in fig. 2 each include a grounded serial capacitor and inductor, but the capacitance and the inductance of each path are different. In this embodiment, the aperture tuner 12 is used to adjust the resonant frequency of the antenna radiator 31 to match the frequency currently used for mobile phone communication. The addition of different tuning lines (capacitance or inductance) between the switch and the antenna radiator 31 can be used to further adjust the resonant frequency to support different frequency bands.
As shown in fig. 2, the impedance tuner 11 includes three impedance tuning lines and an impedance tuning controllable switch (see an arrow in a dashed box for identifying the impedance tuner 11 in fig. 2) for disconnecting or selectively coupling at least one of the impedance tuning lines to a feed point of the antenna radiator. More specifically, the aperture tuning lines include a direct-connection line, or a grounded capacitor, or a grounded inductor, or a grounded series capacitor and inductor, and the three aperture tuning lines in fig. 1 each include a grounded series capacitor and inductor, but the capacitance and inductance of each path are different. In this embodiment, the impedance tuner 11 is configured to maximally improve Power transmission between the radio frequency front end and the antenna radiator 31, and increase TRP (Total Radiated Power) and TIS (Total isotropic sensitivity) by minimizing mismatch loss between the antenna and the antenna front end. More importantly, impedance tuning also helps compensate for environmental effects, such as the position of a person's hand and head on a smartphone.
The present embodiment also provides an electronic device comprising the tuning system described above.
As shown in fig. 3, this embodiment further provides a tuning method, including:
(1) detecting the RSSI of an antenna radiator, and judging whether the variation amplitude (for example, the deterioration amplitude, specifically, the attenuation amplitude) of the RSSI within a predetermined time t is greater than or equal to a predetermined value S1, if so, entering the step (2a), otherwise, entering the step (2 b); in this embodiment, t is 1S, and S1 is 3 dB.
(2a) Respectively carrying out aperture tuning operation and impedance tuning operation on the antenna radiator through an aperture tuner and an impedance tuner;
(2b) and carrying out aperture tuning on the antenna radiator through an aperture tuner.
From the above, the tuning system or the tuning method described above can work in two modes, the first mode being a pure aperture tuning mode, and the second mode being a combination of aperture tuning and impedance tuning.
The first mode corresponds to performance when the antenna state is FS; the second mode corresponds to performance when the antenna states are BHL, BHR, HL, HR, BHHL, BHHR. Among them, BHL, BHR, HL, HR, BHHL, BHHR are several specific cases where the handset is held by hand or close to the head, and the abbreviated terms in the art are explained as follows:
BHL is Beside Head Left Side, near the Left Head;
BHR — Beside Head Right Side, near the Right Head;
HL — Hand Left, Hand held;
HR — Hand Right;
BHHL ═ Beside Head and Hand Left Side, close to the Head of a person and held by the Left Hand;
BHHR is Beside Head and Hand Side, close to the Head and Hand held in the Right Hand.
When the system is in the first mode, the antenna performance has been tuned to be optimal, and the antenna impedance is close to the matching point. However, when a person holds the electronic device by a hand or the head of the person approaches the electronic device, the impedance of the antenna deviates from the vicinity of the matching point, the farther the deviation is, the more the impedance mismatch is, the larger the reflected power is, and the more the performance of the antenna is deteriorated; therefore, the second mode aims to pull the impedance from a position deviated from the matching point back to the vicinity of the matching point when a person holds the mobile phone or the head of the person approaches the mobile phone electronic device, so as to reduce the reflected power and improve the radiation power.
As shown in fig. 4, the condition of mode switching is a trigger condition of the impedance tuner 11: and when the RSSI deteriorates by more than 3dB in a short time, dividing the impedance tuning operation into different states according to different sections of the change amplitude, and configuring different impedance tuning adaptive values. For example, 3-5dB is the first state, 6-8dB is the second state, and more than 8dB is the third state, and the states are divided into several states, and the adjustment can be made according to the actual situation. Because the performance of the antenna is different when the states of the antenna are BHL, BHR, HL, HR, BHHL and BHHR, the antenna is related to the position of the antenna on the mobile phone, the influence of the head of a person on the upper part of the mobile phone is large, the influence of the hand of a person on the lower part of the mobile phone is large, the influence of the left head of a left hand on the left side of the mobile phone is large, and the influence of the right head of a right hand on the right side of the mobile phone is large. When the system is in these three states, the impedance tuner 11 is turned on and uses different tuning lines (capacitance or inductance) to adapt, the adaptation value is adjusted according to the actual situation, the larger the RSSI change value is, the larger the capacitance value and the smaller the inductance value are needed to adapt.
Claims (10)
1. A tuning system comprising an antenna radiator and a feed and aperture tuner coupled to the antenna radiator; the device is characterized by also comprising an impedance tuner and a detection control module; the impedance tuner is coupled to a feed point of the antenna radiator, and the detection control module detects the RSSI of the antenna radiator and controls the on-off of the impedance tuner and the impedance tuning adaptive value according to the detection result of the RSSI.
2. The tuning system of claim 1, wherein the antenna radiator is grounded through a metal connection.
3. The tuning system of claim 1, wherein an antenna matching circuit is disposed between the antenna radiator and the feed.
4. The tuning system of any one of claims 1-3, wherein the aperture tuner comprises at least two aperture tuning lines and an aperture tuning controllable switch that disconnects the at least two aperture tuning lines or selectively couples the at least one aperture tuning line to the antenna radiator.
5. The tuning system of claim 4, wherein the impedance tuner comprises at least two impedance tuning lines and an impedance tuning controllable switch that disconnects the at least two impedance tuning lines or selectively couples the at least one impedance tuning line to a feed point of the antenna radiator.
6. The tuning system of claim 5, wherein the aperture tuning line comprises a direct-to-ground line, or a ground capacitor, or a ground inductor, or a series capacitor and inductor to ground; the impedance tuning circuit comprises a direct connection circuit, or a grounded capacitor, or a grounded inductor, or a grounded series capacitor and inductor.
7. An electronic device, characterized in that it comprises a tuning system according to any one of claims 1 to 6.
8. A method of tuning, comprising:
(1) detecting the RSSI of an antenna radiator, judging whether the variation amplitude of the RSSI within a preset time t is greater than or equal to a preset value S1, if so, entering the step (2a), otherwise, entering the step (2 b);
(2a) respectively carrying out aperture tuning operation and impedance tuning operation on the antenna radiator through an aperture tuner and an impedance tuner;
(2b) and carrying out aperture tuning on the antenna radiator through the aperture tuner.
9. The tuning method according to claim 8, wherein when the variation of the RSSI is greater than or equal to the predetermined value S1 within a predetermined time t, different impedance tuning adaptation values are configured for the impedance tuning operation according to different intervals in which the variation is located.
10. The tuning method of claim 9, wherein the larger the magnitude of the change, the larger the capacitance value and the smaller the inductance value of the impedance tuning operation configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111382388.2A CN114069236A (en) | 2021-11-22 | 2021-11-22 | Tuning system, tuning method and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111382388.2A CN114069236A (en) | 2021-11-22 | 2021-11-22 | Tuning system, tuning method and electronic equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114069236A true CN114069236A (en) | 2022-02-18 |
Family
ID=80278724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111382388.2A Pending CN114069236A (en) | 2021-11-22 | 2021-11-22 | Tuning system, tuning method and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114069236A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080242346A1 (en) * | 2007-03-14 | 2008-10-02 | Broadcom Corporation, A California Corporation | Wireless communication device with programmable antenna system |
| EP2429032A1 (en) * | 2010-09-10 | 2012-03-14 | Sony Ericsson Mobile Communications AB | Antenna matching structure, antenna matching method and wireless communication terminal |
| US20120295555A1 (en) * | 2011-05-16 | 2012-11-22 | Paratek Microwave, Inc. | Method and apparatus for tuning a communication device |
| US20130021220A1 (en) * | 2011-07-18 | 2013-01-24 | The Johns Hopkins University | System and Method for Impedance Matching in Antennas |
| EP2688141A1 (en) * | 2012-07-19 | 2014-01-22 | BlackBerry Limited | Method and apparatus for beam forming and antenna tuning in a communication device |
| EP2871775A1 (en) * | 2013-11-12 | 2015-05-13 | Skyworks Solutions, Inc. | Devices and methods related to radio-frequency switches having improved performance |
| CN108111233A (en) * | 2016-11-24 | 2018-06-01 | 中兴通讯股份有限公司 | A kind of method of mobile terminal and tuned antenna |
| CN109462031A (en) * | 2018-10-10 | 2019-03-12 | 清华大学 | Twin-stage tunable antenna based on variable inductance and variable capacitance |
| CN209418765U (en) * | 2019-02-15 | 2019-09-20 | 惠州德恳电子科技有限公司 | A kind of tunable multiband aerial |
| US10671822B1 (en) * | 2019-09-11 | 2020-06-02 | RadicalID, Inc. | Multipurpose RFID transponder and a system for reading it |
| CN112073561A (en) * | 2020-09-08 | 2020-12-11 | 珠海格力电器股份有限公司 | Antenna system of mobile terminal and mobile terminal |
-
2021
- 2021-11-22 CN CN202111382388.2A patent/CN114069236A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080242346A1 (en) * | 2007-03-14 | 2008-10-02 | Broadcom Corporation, A California Corporation | Wireless communication device with programmable antenna system |
| EP2429032A1 (en) * | 2010-09-10 | 2012-03-14 | Sony Ericsson Mobile Communications AB | Antenna matching structure, antenna matching method and wireless communication terminal |
| US20120295555A1 (en) * | 2011-05-16 | 2012-11-22 | Paratek Microwave, Inc. | Method and apparatus for tuning a communication device |
| US20130021220A1 (en) * | 2011-07-18 | 2013-01-24 | The Johns Hopkins University | System and Method for Impedance Matching in Antennas |
| EP2688141A1 (en) * | 2012-07-19 | 2014-01-22 | BlackBerry Limited | Method and apparatus for beam forming and antenna tuning in a communication device |
| EP2871775A1 (en) * | 2013-11-12 | 2015-05-13 | Skyworks Solutions, Inc. | Devices and methods related to radio-frequency switches having improved performance |
| CN108111233A (en) * | 2016-11-24 | 2018-06-01 | 中兴通讯股份有限公司 | A kind of method of mobile terminal and tuned antenna |
| CN109462031A (en) * | 2018-10-10 | 2019-03-12 | 清华大学 | Twin-stage tunable antenna based on variable inductance and variable capacitance |
| CN209418765U (en) * | 2019-02-15 | 2019-09-20 | 惠州德恳电子科技有限公司 | A kind of tunable multiband aerial |
| US10671822B1 (en) * | 2019-09-11 | 2020-06-02 | RadicalID, Inc. | Multipurpose RFID transponder and a system for reading it |
| CN112073561A (en) * | 2020-09-08 | 2020-12-11 | 珠海格力电器股份有限公司 | Antenna system of mobile terminal and mobile terminal |
Non-Patent Citations (1)
| Title |
|---|
| D.M.波扎等: "采用孔径耦合微带片的无限相控阵的分析", 《雷达与对抗》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6643497B1 (en) | Portable telephone compensable for change of antenna impedance | |
| JP3048076B2 (en) | Mobile radio telephone | |
| US20020193088A1 (en) | Frequency matching method and apparatus for mobile systems | |
| US6526263B1 (en) | Antenna impedance adjuster | |
| EP2044693B1 (en) | Dual autodiplexing antenna | |
| US6895225B1 (en) | System for matching an antenna for a wireless communication device | |
| US7885614B2 (en) | Antenna switch with adaptive filter | |
| US20040121828A1 (en) | Mobile communication | |
| US6144346A (en) | Antenna arrangement | |
| KR20070029084A (en) | Antenna device and wireless communication terminal | |
| WO2017044224A1 (en) | Antenna selection and tuning | |
| CN102170305A (en) | Antenna performance control system and method | |
| US20030048227A1 (en) | Portable radio equipment capable of receiving signals of multiple frequency bands | |
| JP2000165124A (en) | Portable radio terminal, flip and hinge | |
| CN114069236A (en) | Tuning system, tuning method and electronic equipment | |
| US7515894B2 (en) | System and method for providing a multiband antenna | |
| GB2317993A (en) | Antenna switching means for portable radio apparatus | |
| JPH09116457A (en) | Impedance matching device | |
| JP2989850B2 (en) | Portable wireless communication device | |
| JPH08102617A (en) | Antenna system | |
| JP3866923B2 (en) | Portable wireless communication device | |
| KR20050089604A (en) | Radio frequency signal characteristic compensating apparatus in a mobile communication terminal | |
| JP2001308739A (en) | transceiver | |
| KR20050052702A (en) | Device for matching ground line antenna | |
| CN220628226U (en) | LTE cellular antenna applied to intelligent wearable equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220218 |
|
| RJ01 | Rejection of invention patent application after publication |