SIP packaging chip integrated with UWB

Abstract

The utility model provides an SIP packaging chip integrated with UWB, and the chip comprises a UWB module which is used for achieving the positioning, object searching and tracking functions, and comprises a UWB chip, a UWB peripheral circuit, a UWB external radio frequency switch, and a UWB in-chip antenna; the storage module is used for storing related data and processing programs; wherein the UWB chip, the UWB external radio frequency switch and the UWB in-chip antenna are connected in sequence, and the UWB external radio frequency switch is used for switching the sending and receiving of the UWB chip, so that the sending and receiving of the UWB chip multiplex the same antenna, and the overall space is saved.

Description

Technical Field

[0001] The utility model relates to the field of communication radio frequency, in particular to a SIP package chip integrated with UWB. Background Art

[0002] Ultra-Wideband (UWB) is a wireless communication technology characterized by the use of very wide frequency bands for data transmission, usually within a bandwidth range of more than 500MHz. UWB technology has the advantages of high-precision positioning and high data rate transmission, so it is widely used in many fields. With the development of the Internet of Things and smart devices, technology continues to advance, and ultra-wideband technology has been widely popularized around the world, including industrial, enterprise, automotive and consumer markets. Among the applications that have been implemented so far, UWB has achieved improvements in operational efficiency and employee safety in many industry fields. It also supports many applications such as access control, keys, and positioning, tracking, and finding people and objects.

[0003] In the existing technology, ultra-wideband technology is often used in smart home, object finding, positioning, navigation and other fields. According to the traditional design, developers need to design the peripheral hardware circuit of UWB and develop software by themselves. In addition, they need to debug and design the antenna separately, which consumes additional human resources and unnecessary other resources. The circuit designed by developers themselves often takes up a large circuit board space. Due to the trend of miniaturization of existing electrical equipment, the product volume and structure are limited by the circuit board space and cannot be further reduced.

[0004] In summary, the prior art has the problem that it takes a lot of manpower, is costly, and occupies a large space for developers to develop hardware for ultra-wideband on their own. Utility Model Content

[0005] In order to solve the problems existing in the prior art, the utility model provides a SIP packaged chip with integrated UWB. The chip package integrates the entire system of UWB and UWB antenna hardware and software, which can reduce the development and use costs of developers and is highly integrated, further reducing the size of the chip involved in related functions.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] The utility model provides a SIP package chip integrated with UWB, comprising:

[0008] UWB module, used to realize positioning, object finding and tracking functions, including UWB chip, UWB peripheral circuit, UWB external RF switch and UWB on-chip antenna;

[0009] A storage module, used for storing relevant data and processing programs;

[0010] The UWB chip, the UWB external RF switch and the UWB internal antenna are connected in sequence, and the UWB external RF switch is used to switch the transmission and reception of the UWB chip so that the transmission and reception reuse the same antenna, saving overall space.

[0011] In some embodiments, the UWB module further includes a UWB external filter, which is disposed in a connection line between the UWB external RF switch and the UWB on-chip antenna, and is used for out-of-band filtering to reduce external interference.

[0012] In some embodiments, the UWB on-chip antenna is printed on a circuit board in the form of a PCB.

[0013] In some embodiments, the UWB module further includes an external antenna interface connected to the UWB chip for providing expansion.

[0014] In some embodiments, the storage module includes a UWB memory disposed on the UWB chip, for storing UWB related data and processing programs.

[0015] Compared with the prior art, the utility model has the following beneficial effects:

[0016] The UWB integrated SIP packaged chip provided by the utility model includes a UWB module including an antenna and a storage module, a highly integrated UWB antenna and the entire UWB hardware and software system. Through this SIP packaged interface, users can design the desired products and various functions they want to achieve by themselves, thereby realizing diversified and flexible product design. Moreover, by setting a radio frequency switch, there is no need to design two separate antennas for TX and RX separately, and only one antenna is needed to achieve communication, thereby further reducing the occupied space, so that a SIP packaged chip can be used directly to replace the complex hardware, software and antenna design, and the packaged chip can be directly affixed when in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a functional block diagram of an embodiment of the utility model.

[0018] Figure 2 This is a schematic diagram of a PCB according to an embodiment of the utility model.

[0019] Figure 3 It is a schematic diagram of a single antenna on chip solution in an embodiment of the utility model.

[0020] Figure 4 It is a schematic diagram of an off-chip single antenna solution in an embodiment of the utility model.

[0021] Figure 5-6This is an example of an RF impedance matching network in an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will clearly and completely describe the technical solutions in the embodiments of the utility model in conjunction with the drawings in the embodiments of the utility model; it is obvious that the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments of the utility model without making creative work are within the scope of protection of the utility model.

[0023] The utility model is a SIP package chip, which integrates the circuit of the UWB chip, the related RF circuit, the RF switch and the filter. The most important thing is to integrate the UWB antenna into the SIP package application. The user does not need to develop and design the UWB schematic and PCB by himself, nor does he need to design the UWB antenna separately. A built-in PCB antenna has been integrated in the SIP package, and a 7*7mm SIP package chip is directly used instead.

[0024] This application integrates antenna, RF circuit, power management and clock circuit. UWB can work in SS-TWR ranging or DS-TWR ranging mode, and the positioning accuracy can reach 10 cm. It supports data rates of 850Kbps, 6.8Mbps, 7.8Mbps, 27.2Mbps and 31.2Mbps (default 850Kbps). The UWB chip supports basic pulse repetition frequency (BPRF) mode 64MHz peak repetition frequency and higher pulse repetition frequency (HPRF) mode, 124.8MHz and 249.6MHz peak pulse repetition frequency. The chip supports secure ranging sequence (STS) based on scrambled timestamp.

[0025] This application directly uses a 7*7mm SIP package to highly integrate the UWB antenna and the entire UWB hardware and software system. Through this SIP package interface, users can design the desired products and various functions they want to achieve, realizing product design diversification and flexibility. A built-in AIP antenna has been integrated into the SIP package, integrating the antenna with the circuit to achieve a single package for the integration of the antenna and RF components. The antenna is no longer an independent component integrated in the wireless device; the complete package includes the antenna and other integrated circuits. The complex hardware and software and antenna design are directly replaced by a SIP packaged chip. This package application can be directly attached, which can reduce the complex hardware, software and antenna design, while retaining as many GPIO resources of the UWB chip as possible, facilitating customers to carry out secondary development.

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-2 The utility model provides a SIP packaged chip with integrated UWB, including: a UWB module for realizing positioning, object finding and tracking functions, including a UWB chip, a UWB peripheral circuit, a UWB external RF switch and a UWB on-chip antenna; a storage module for storing relevant data and processing programs; wherein the UWB chip, the UWB external RF switch and the UWB on-chip antenna are connected in sequence, and the UWB external RF switch is used to switch the transmission and reception of the UWB chip, so that the transmission and reception reuse the same antenna, saving the overall space. In some embodiments, the UWB module also includes a UWB external filter, which is arranged in the connection line between the UWB external RF switch and the UWB on-chip antenna, and is used for out-of-band filtering to reduce external interference; the UWB on-chip antenna is printed on the circuit board in the form of a PCB; the UWB module also includes an external antenna interface connected to the UWB chip, which is used to provide expansion; the storage module includes a UWB memory arranged on the UWB chip, which is used to store relevant data and processing programs of UWB.

[0028] The innovation of this solution lies in that it is equipped with a UWB chip and an on-board antenna and uses a radio frequency switch, making the solution more integrated and more functional.

[0029] A filter is designed outside the UWB for out-of-band filtering to reduce unnecessary interference. After adding the filter, the test distance is increased from the original 10-20 meters to more than 100 meters, greatly improving the effective distance. An RF switch is added outside the UWB, so that this solution does not need to design two separate antennas for TX and RX. The RF switch is used to switch TX and RX, and communication can be achieved with only one antenna, thereby reducing the occupied space.

[0030] In some embodiments, a substrate is used instead of a PCB board. Since the substrate can be made thinner, the system size can be further reduced. Some devices thereon are packaged in 01005 packages. The size of the 01005 package is 0.4 mm x 0.2 mm (400 μm x 200 μm), which is the smallest standardized package size currently.

[0031] According to the traditional design, the general antenna design requires an external antenna. However, this design adopts a simple antenna form, prints the antenna on the board in the form of PCB, and optimizes and debugs the internal matching to make the antenna occupy a smaller area. Specifically, the impedance is adjusted to 50 ohms as much as possible through impedance matching and adding capacitors and inductors. The transmitting interface of the SIP chip has completed 50ohm matching internally, and the receiving port needs to rely on the components (inductors and capacitors) on the board. According to the frequency band required by the application scenario, impedance matching is performed according to 50ohm. The recommended matching depth S11≤-10dB. An example of RF impedance matching network is as follows: Figure 5-6 , and make adjustments based on the actual working frequency band.

[0032] This solution uses smaller device packages through device selection and layout design by senior hardware engineers to make the overall layout structure more compact. And the application is embodied in the form of SIP chip packaging to make the volume even smaller and only 7*7mm can be realized.

[0033] In a specific embodiment, Figure 1 , using the package of the uwb chip and the related flash in a SIP package chip with integrated UWB, designing the hardware circuit and developing the software through the related package. At the same time, designing the RF network, RF switch, filter and other RF circuits around the UWB chip, and matching the 50Ω impedance in the chip. The UWB antenna is designed and integrated in the chip, so users do not need to design the antenna again.

[0034] The working principle of this SIP is that due to the design of the peripheral hardware circuit of the UWB on the chip, when the application requires positioning, object search and other functions, precise positioning can be achieved through UWB. UWB can achieve cm-level precise positioning, and also supports AoA angle positioning. Combined with precise distance and direction, it can quickly realize accurate search and find applications, and supports self-developed design of other functions.

[0035] The solution of the utility model has been applied to product development.

[0036] The utility model has the following advantages:

[0037] 1. Through UWB packaging, the relevant hardware circuits are integrated into a 7*7mm package application, so users can directly apply it without having to design the circuit themselves;

[0038] 2. The high-performance UWB-AIP (Antenna in Package) antenna is integrated in the SIP package, eliminating the need for off-chip antenna design;

[0039] 3. Users can design the desired functions by themselves through the SIP encapsulation interface to achieve the diversification of product functions;

[0040] 4. The package of only 7*7mm greatly reduces the space and area of ​​product design;

[0041] 5. The RF circuit has been debugged on-chip, so there is no need for time-consuming external debugging.

[0042] In addition, this solution also has the following features

[0043] UWB Features:

[0044] ◆Highly integrated SoC based on ultra-wideband technology;

[0045] ◆Including RF, analog, baseband, MCU, SRAM, flash memory and peripherals, users do not need RF design;

[0046] ◆Compliant with IEEE 802.15.4-2020, 802.15.4z-2020UWB standards and the latest FiRa standards;

[0047] ◆Supported frequency range: 6GHz to 9GHz

[0048] ◆Programmable transmission power;

[0049] ◆Multiple working modes: power off, deep sleep, sleep, receive and send; chip power consumption in sleep mode is <1mA;

[0050] ◆Supports working modes such as two-way ranging (TWR) (ToF) and time difference of arrival (TDoA) positioning based on flight time;

[0051] Data rates: 850Kbps, 6.8Mbps, 7.8Mbps, 27.2Mbps and 31.2Mbps, with 850Kbps as the default setting.

[0052] ◆The maximum packet length for high data throughput applications is 4095 bytes;

[0053] ◆Integrated ARM Cortex-M0 32-bit processor, clock up to 124.8MHz;

[0054] ◆Integrated AES-128 / 256 for secure distance measurement;

[0055] ◆Due to the high integration of SoC, no external PA or balun is required.

[0056] Antenna solutions are divided into on-chip antennas and off-chip antennas. Off-chip antennas can be divided into PCB board integrated types and SMA external types.

[0057] like Figure 3 It is an on-chip single-antenna solution, mainly suitable for ranging or tag applications; Figure 4 It is an off-chip single antenna solution, mainly suitable for ranging functions.

[0058] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A SIP packaged chip with integrated UWB, characterized in that: include: UWB module, used to realize positioning, object finding and tracking functions, including UWB chip, UWB peripheral circuit, UWB external RF switch and UWB on-chip antenna; A storage module, used for storing relevant data and processing programs; The UWB chip, the UWB external RF switch and the UWB internal antenna are connected in sequence, and the UWB external RF switch is used to switch the transmission and reception of the UWB chip so that the transmission and reception reuse the same antenna, saving overall space.

2. The SIP packaged chip with integrated UWB according to claim 1, characterized in that: The UWB module further includes a UWB external filter, which is disposed in a connection line between the UWB external RF switch and the UWB on-chip antenna and is used for out-of-band filtering to reduce external interference.

3. The SIP packaged chip integrated with UWB according to claim 1, characterized in that: The UWB on-chip antenna is printed on a circuit board in the form of a PCB.

4. The SIP packaged chip with integrated UWB according to claim 1, characterized in that: The UWB module also includes an external antenna interface connected to the UWB chip for providing expansion.

5. The SIP packaged chip integrated with UWB according to claim 1, characterized in that: The storage module includes a UWB memory arranged on the UWB chip, and is used for storing relevant data and processing programs of UWB.

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