A handheld personal assistant device antenna arrangement

Abstract

The application further provides a handheld personal assistant device antenna device, and specific technical solutions are as follows: a processor and an antenna end shared by a radio frequency identification ultra-high frequency linear antenna and a diversity antenna; an antenna tuner used for receiving a control signal of the processor, switching a resonance point, and adapting an operating frequency of the ultra-high frequency linear antenna or the diversity antenna; a radio frequency switch module connected with the processor through a first control interface and connected with the antenna end through a plurality of radio frequency channels, and used for switching a radio frequency channel state of the radio frequency identification ultra-high frequency linear antenna and the diversity antenna. The application realizes antenna multiplexing of the radio frequency identification ultra-high frequency linear antenna and the diversity antenna through a switch and an interface, reduces the number of antennas required by a mobile device and hardware cost, improves product competitiveness, and enhances product practicability.

Description

Technical Field

[0001] This application relates to the field of mobile terminals, and in particular to an antenna device for a handheld personal assistant device. Background Technology

[0002] Currently, handheld PDAs (Personal Digital Assistants) on the market are facing increasingly stringent ID requirements, gradually resembling the form factor of consumer smartphones. These devices are becoming ultra-thin, and PDAs have numerous peripherals such as scanners, power / volume buttons, QR code scanning buttons, fingerprint unlocking, SIM card slots, and UWB (Ultra Wide Band) technology, all of which significantly compress antenna space, posing a significant challenge to antenna design. Adding an RFID UHF (Radio-Frequency Identification Ultra High Frequency) antenna to the product presents a cost challenge, as RFID UHF antennas use linear antennas (a type of antenna where the electric field vector of the electromagnetic wave is linear, meaning the electric field direction remains a fixed straight line in space). Therefore, how to rationally arrange antennas within limited space while simultaneously meeting the requirements of multiple wireless communication functions is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0003] The purpose of this application is to provide an antenna device for a handheld personal assistant device that integrates a diversity antenna and a radio frequency identification (RFID) module into a linear antenna, thereby reducing the product size of a personal digital assistant that includes an RFID module and enhancing product usability.

[0004] To address the aforementioned technical problems, this application provides an antenna device for a handheld personal assistant device, the specific technical solution of which is as follows:

[0005] The processor, and the antenna terminal shared by the RFID UHF linear antenna and diversity antenna;

[0006] The antenna tuner is used to receive control signals from the processor and switch the resonant point to adapt to the operating frequency of the ultra-high frequency linear antenna or the diversity antenna.

[0007] A radio frequency switch module, which is connected to the processor via a first control interface and to the antenna via several radio frequency paths, is used to switch the radio frequency identification UHF linear antenna and the diversity antenna radio frequency path states.

[0008] Optionally, between the antenna tuner and the processor, there may also be:

[0009] An analog switch is provided, with its first end connected to the processor via a common input / output port and its second end connected to the antenna tuner via several input / output ports, for switching the input / output ports based on the operating state of the radio frequency identification module connected to the processor.

[0010] Optionally, the radio frequency switch module includes a single-pole double-throw radio frequency switch.

[0011] The first port of the single-pole double-throw RF switch is connected to the first RF link of the RFID UHF linear antenna, and the second port is connected to the second RF link of the diversity antenna. It is used to receive the level signal of the first control interface. The level signal is used to switch the RF path state of the RFID UHF linear antenna and the diversity antenna.

[0012] Optional, also includes:

[0013] The radio frequency identification (RFID) module transceiver has one end connected to the single-pole double-throw (SPDT) RF switch and the other end connected to the main antenna. It is used to control the antenna tuner when the RFID module is turned off.

[0014] Optionally, the main antenna includes at least two ground lines and one feed line; the feed line is used to transmit signals.

[0015] Optionally, an RF signal transmission path is provided between the single-pole double-throw RF switch and the RF identification module for transmitting the RF signal of the RF identification module.

[0016] Optionally, the antenna end is a PIFA structure radiator, and the PIFA structure radiator further includes:

[0017] The RF front-end module integrates a power amplifier, a low-noise amplifier, a filter, and an impedance matching circuit to amplify, filter, and impedance match the transmit and receive signals.

[0018] Optionally, the dielectric substrate of the PIFA structure radiator is a multilayer FR4 structure.

[0019] Optionally, a second control interface is provided between the analog switch and the processor, the second control interface being used to transmit the interrupt control signal of the processor.

[0020] Optionally, the RFID transceiver module is connected to the single-pole double-throw RF switch via a diversity RF path.

[0021] This application also provides an antenna device for a handheld personal assistant device, the specific technical solution of which is as follows: a processor, and an antenna terminal shared by a radio frequency identification (RFID) UHF linear antenna and a diversity antenna; an antenna tuner for receiving control signals from the processor and switching the resonant point to adapt to the operating frequency of the UHF linear antenna or the diversity antenna; and a radio frequency switch module connected to the processor through a first control interface and connected to the antenna terminal through several radio frequency paths for switching the radio frequency path states of the RFID UHF linear antenna and the diversity antenna.

[0022] The handheld personal assistant device antenna device provided in this application shares a single antenna terminal for the radio frequency identification (RFID) module's UHF linear antenna and diversity antenna. Since the RFID UHF linear antenna and diversity antenna share a common frequency band, antenna reuse can be achieved by switching the switch and interface through the antenna tuner and RF switch control, thereby reducing the number of antennas required for mobile devices and the hardware cost, improving product competitiveness and enhancing product practicality. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0024] Figure 1 This is an exemplary structural diagram of the antenna device for a handheld personal assistant device provided in an embodiment of this application. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0026] The handheld personal assistant antenna device includes:

[0027] processor;

[0028] The antenna terminal is shared by the radio frequency identification UHF linear antenna and the diversity antenna;

[0029] The antenna tuner is used to receive control signals from the processor and switch the resonant point to adapt to the operating frequency of the ultra-high frequency linear antenna or the diversity antenna.

[0030] A radio frequency switch module, which is connected to the processor via a first control interface and to the antenna via several radio frequency paths, is used to switch the radio frequency identification UHF linear antenna and the diversity antenna radio frequency path states.

[0031] The processor model and parameters used in this application are not limited, and any processor suitable for handheld devices can be used.

[0032] The operating frequency range of RFID UHF linear antennas is 860-960MHz, while the operating frequency range of 4G network diversity antennas is 700-2690MHz. Since they share the same operating frequency, this invention designs an RFID UHF and diversity antenna system that uses RF switches, analog switches, control interfaces, etc., to allow for mutual switching and reuse of the same antenna. The diversity antenna achieves this mutual switching and reuse of the same antenna terminal through an RF switch module and an antenna tuner.

[0033] The control logic of the RF switch module is as follows:

[0034] When the RFID module is enabled, the first control interface is controlled to output a low level, the RF switch module switches to the RFID RF path (i.e., the RF path) of the RFID module, and the RF path of the diversity antenna is disconnected.

[0035] When the RFID module is off, the first control interface outputs a high level, the RFID switch module disconnects the RFID RF path and opens the RF path of the diversity antenna.

[0036] See Figure 1 , Figure 1 This is an exemplary structural diagram of the antenna device for a handheld personal assistant device provided in an embodiment of this application. Figure 1 The system includes a processor, main antenna, RFID module receiver, RFID module, analog switch (with two output points and two switching positions), antenna tuner, single-pole double-throw RF switch, antenna terminal integrating diversity antenna and RF antenna, common input / output interface, first control interface, second control interface, RF signal transmission path, and diversity RF path.

[0037] like Figure 1 When using a single-pole double-throw (SPDT) RF switch, the first port of the SPDT is connected to the first RF link of the RFID UHF linear antenna, and the second port is connected to the second RF link of the diversity antenna. This is used to receive the level signal from the first control interface, which is used to switch the RF path states of the RFID UHF linear antenna and the diversity antenna. Those skilled in the art can also use other types of RF switches, which are not listed here.

[0038] The antenna tuner receives control signals from the processor and switches the resonant point to match the operating frequency of the ultra-high frequency linear antenna or the diversity antenna. See also... Figure 1 The control logic of the antenna tuner is as follows:

[0039] When the RFID module is activated, the GPIO bus of the analog switch switches to GPIO2 and GPIO3 control modes, forcing the antenna tuner to be fixedly connected to the RF1 port;

[0040] When the RFID module is off, the GPIO bus of the analog switch switches to GPIO 0 and GPIO 1 control modes. The RFID module transceiver then controls the antenna tuner to dynamically select RF1 / RF2 / RF3 / RF4 ports to adapt to different frequency bands. For example, a 4G baseband chip can be used as the main control terminal to select the appropriate frequency band. How to select RF1 / RF2 / RF3 / RF4 ports to adapt to different frequency bands is existing technology in this field and will not be described in detail here.

[0041] In one feasible application, the RFID transceiver module monitors the received signal in real time, identifies its frequency band characteristics, and determines the frequency band range to which the signal belongs, such as UHF, HF, etc. Based on system design requirements, the frequency band ranges corresponding to ports RF1, RF2, RF3, and RF4 are pre-configured. For example, RF1 corresponds to 868MHz, RF2 to 915MHz, RF3 to 2.4GHz, and RF4 to 5.8GHz, etc. The identified signal frequency band is compared with the preset port frequency band configuration to determine the most suitable port for that frequency band. If the signal frequency band matches the preset frequency band of RF2, port RF2 is selected. The processor generates a control signal and sends it to the switching circuit of the RF front end through the control interface, driving the switch to connect the selected port to the signal path, completing the signal switching and ensuring signal transmission at the optimal port. The line tuner receives the control signal from the processor and adjusts the tuning element parameters according to the frequency band requirements of the selected port, such as changing the capacitance of the variable capacitor or the inductance value of the variable inductor. Antenna tuners fine-tune the input impedance of the antenna to match the characteristic impedance of the transmission line, which can improve signal transmission efficiency, reduce reflection loss, and ensure that the antenna operates efficiently in the selected port frequency band.

[0042] The handheld personal assistant device antenna device provided by this utility model shares a single antenna end between the radio frequency identification (RFID) module's UHF linear antenna and diversity antenna. Since the RFID UHF linear antenna and diversity antenna share a common frequency band, antenna reuse can be achieved by switching the switch and interface through antenna tuner and RF switch control. This reduces the number of antennas required for mobile devices and the hardware cost, thereby improving product competitiveness and enhancing product practicality.

[0043] In one feasible implementation, such as Figure 1 As shown, an analog switch is also provided between the antenna tuner and the processor. The first end of the analog switch is connected to the processor through a common input / output port, and the second end of the analog switch is connected to the antenna tuner through several input / output ports. It is used to switch the input / output ports based on the working state of the radio frequency identification module connected to the processor.

[0044] The signal link is connected and disconnected by controlling the on and off states of the analog switch. When signal transmission needs to be enabled, the analog switch is closed; when signal transmission needs to be disabled, the analog switch is opened.

[0045] Analog switches can be used in conjunction with components such as capacitors and inductors to dynamically adjust the resonant frequency and matching characteristics of a circuit by changing the state of the analog switch. For example, in an antenna tuning circuit, analog switches are used to switch different tuning elements, allowing the antenna to operate at different frequencies.

[0046] In one feasible implementation, such as Figure 1 As shown, the antenna device for a handheld personal assistant device may also include a radio frequency identification (RFID) transceiver module, one end of which is connected to the single-pole double-throw (SPDT) RF switch, and the other end is connected to the main antenna, for controlling the antenna tuner when the RFID module is off. The structure of the main antenna is not limited here, such as... Figure 1 As shown, it contains at least two ground lines and one feeder. The feeder is used to transmit signals, and the at least two ground lines ensure signal isolation and maintain signal stability.

[0047] In addition, an RF signal transmission path is provided between the single-pole double-throw RF switch and the RF identification module for transmitting the RF signal of the RF identification module, and the RF identification module transceiver can be connected to the single-pole double-throw RF switch through the diversity RF path.

[0048] In one feasible implementation, the antenna adopts a PIFA (Plane Inverted-F Antenna) structure and further includes: an RF front-end module integrating a power amplifier, a low-noise amplifier, a filter, and an impedance matching circuit for amplifying, filtering, and impedance matching the transmitted and received signals. The PIFA structure features a flat design, enabling good antenna performance within a small space, and offers relatively high radiation efficiency, achieving good signal transmission and reception with low power consumption. Furthermore, the dielectric substrate of the PIFA radiator can be a multilayer FR4 structure. Multilayer FR4 structures possess excellent mechanical strength, ensuring stable antenna performance under various environmental conditions, and can be stacked to achieve three-dimensional miniaturization, effectively utilizing space and making them suitable for space-constrained devices such as handheld personal assistants.

[0049] Furthermore, a second control interface can be provided between the analog switch and the processor. This second control interface is used to transmit interrupt control signals from the processor. The second control interface enables the processor to quickly send an interrupt signal to the analog switch, interrupting its current operation and causing it to immediately switch states or execute specific tasks. This effectively shortens system response time and improves the efficiency of antenna frequency switching operations.

[0050] This document uses specific examples to illustrate the principles and implementation methods of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

[0051] It should also be noted that, in this specification, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

Claims

1. An antenna device for a handheld personal assistant device, characterized in that, include: processor; The antenna terminal is shared by the radio frequency identification UHF linear antenna and the diversity antenna; The antenna tuner is used to receive control signals from the processor and switch the resonant point to adapt to the operating frequency of the ultra-high frequency linear antenna or the diversity antenna. A radio frequency switch module, which is connected to the processor via a first control interface and to the antenna via several radio frequency paths, is used to switch the radio frequency identification UHF linear antenna and the diversity antenna radio frequency path states.

2. The handheld personal assistant device antenna device according to claim 1, characterized in that, An analog switch is also provided between the antenna tuner and the processor. The first end of the analog switch is connected to the processor through a common input / output port, and the second end of the analog switch is connected to the antenna tuner through several input / output ports, which is used to switch the input / output ports based on the working state of the radio frequency identification module connected to the processor.

3. The handheld personal assistant device antenna device according to claim 2, characterized in that, The radio frequency switch module includes a single-pole double-throw radio frequency switch. The first port of the single-pole double-throw RF switch is connected to the first RF link of the RFID UHF linear antenna, and the second port is connected to the second RF link of the diversity antenna. It is used to receive the level signal of the first control interface. The level signal is used to switch the RF path state of the RFID UHF linear antenna and the diversity antenna.

4. The handheld personal assistant device antenna device according to claim 3, characterized in that, Also includes: The radio frequency identification (RFID) module transceiver has one end connected to the single-pole double-throw (SPDT) RF switch and the other end connected to the main antenna. It is used to control the antenna tuner when the RFID module is turned off.

5. The handheld personal assistant device antenna device according to claim 4, characterized in that, The main antenna includes at least two ground lines and one feed line; the feed line is used to transmit signals.

6. The handheld personal assistant device antenna device according to claim 3, characterized in that, A radio frequency signal transmission path is provided between the single-pole double-throw RF switch and the single-pole double-throw switch for transmitting the radio frequency signal of the RF identification module.

7. The handheld personal assistant device antenna device according to claim 1, characterized in that, The antenna end is a PIFA structure radiator, and also includes: The RF front-end module integrates a power amplifier, a low-noise amplifier, a filter, and an impedance matching circuit to amplify, filter, and impedance match the transmit and receive signals.

8. The handheld personal assistant device antenna device according to claim 7, characterized in that, The dielectric substrate of the PIFA structure radiator is a multilayer FR4 structure.

9. The handheld personal assistant device antenna device according to claim 2, characterized in that, A second control interface is provided between the analog switch and the processor, and the second control interface is used to transmit the interrupt control signal of the processor.

10. The handheld personal assistant device antenna device according to claim 4, characterized in that, The RFID module transceiver is connected to the single-pole double-throw RF switch via a diversity RF path.

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