Radio frequency distribution unit for testing Ka-band SIP (Session Initiation Protocol) component

Abstract

The utility model relates to a radio frequency distribution unit for Ka frequency band SIP assembly test, which comprises a four-channel power combiner C1, a DPDT switch module SW1, an SPDT switch module SW2, two groups of SP8T switch modules SW3 / SW4, an SP4T switch module SW5, an SP5T switch module SW6, an SP2T harmonic special switch module SW7 and an SP8T switch SW8, bidirectional selection of transmitting / receiving channels is realized through the DPDT switch SW1, the SP8T switch SW3 / SW4 supports time-sharing test of two 8-channel assemblies, and the SP8T switch SW3 / SW4 supports time-sharing test of the two 8-channel assemblies. And the SP8T switch SW8 and the 67GHz harmonic channel SW7 are cascaded to realize secondary harmonic measurement. A 4U shielding case design is adopted, the frequency coverage is 0.3-67 GHz, 4-input 16-output configuration is supported, and a multi-source anti-interference test capability is provided. Through optimal combination of the switch matrix, the use cost of the high-frequency switch is remarkably reduced while the channel isolation is ensured to be greater than or equal to 50dB and 40GHz, parallel test of two sets of SI P components is supported, and the test efficiency is improved by more than 40%.

Description

Technical Field

[0001] This utility model relates to the field of radio frequency transceiver component testing technology, and in particular to a radio frequency distribution unit for testing Ka-band SIP components. Background Technology

[0002] The radio frequency distribution unit mainly consists of microwave switch modules, test cable assemblies, multi-channel combiners, power supply and control circuits, etc. Through the switching control of internal switches, the input and output channels of the product under test are selected with the corresponding test instruments to complete the construction of the test topology for each test item, and realize the test analysis of test items such as single-channel transmit power, transmit phase, receive gain, receive phase, standing wave ratio, etc.

[0003] In existing technologies, traditional RF microwave and military product testing processes typically rely on manual operation. This introduces varying degrees of error due to limitations in testing equipment, operational repeatability, and human intervention. While low-frequency switches are widely used in various production testing fields, higher frequency RF switches are required above the Ka band, especially in scenarios where harmonic measurement needs to be considered. However, currently available 67GHz switch modules are expensive and typically only offer options such as 1-to-2 or 1-to-4 splitters. Therefore, there is an urgent need to optimize the RF distribution unit topology to ensure testing efficiency while reducing testing costs. Utility Model Content

[0004] To address the shortcomings of existing technologies, the purpose of this invention is to provide a radio frequency distribution unit for testing Ka-band SIP components. It adopts an optimized structural design to ensure that multiple interference and test signals can be injected simultaneously in the Ka-band, as well as Ka-band second harmonic testing, thereby greatly improving the testing efficiency of SIP components and effectively reducing R&D and production costs.

[0005] The above-mentioned utility model objective is achieved through the following technical solution:

[0006] A radio frequency distribution unit for testing Ka-band SIP components includes a four-channel power combiner (C1), a DPDT switch module (SW1), an SPDT switch module (SW2), two sets of SP8T switch modules (SW3 / SW4), an SP4T switch module (SW5), an SP5T switch module (SW6), an SP2T harmonic-dedicated switch module (SW7), and an SP8T switch (SW8).

[0007] The input of the four-channel power combiner (C1) is connected to an external excitation source, and the output is connected to the SPDT switch module (SW2), the SP4T switch module (SW5), and the SP8T switch (SW8) respectively through the DPDT switch module (SW1).

[0008] The SPDT switch module (SW2) is time-division connected to two sets of SP8T switch modules (SW3 / SW4) for transmitting channel selection, and the SP4T switch module (SW5) is connected to the receiving channel;

[0009] The SP8T switch (SW8) is connected to the noise figure measurement port of the vector network analyzer via the SP2T harmonic dedicated switch module (SW7).

[0010] As a further technical solution of this utility model: the SP8T switch (SW8) is composed of 4 SPDT load type switches and 3 SPDT non-load type switches cascaded to form a 67GHz SP8T switch matrix.

[0011] As a further technical solution of this utility model: the two sets of SP8T switch modules (SW3 / SW4) are DC-40GHz load-type SP8T switches, which support time-division measurement of the transmission parameters of two 8-channel SIP components.

[0012] As a further technical solution of this utility model: the SP2T harmonic dedicated switch module (SW7) operates at a frequency of DC-67GHz, and shares the vector network analyzer port with the SP8T switch (SW8) to realize second harmonic measurement.

[0013] As a further technical solution of this utility model: the system isolation of the radio frequency distribution unit is ≥50dB@40GHz, the port VSWR is ≤2.0, and the maximum power handling capacity is 1W (DC-40GHz).

[0014] As a further technical solution of this utility model: the radio frequency distribution unit adopts a 4U shielded chassis structure, the front panel is divided into clamp end and test end interface areas, and silk screen markings are set next to each interface.

[0015] As a further technical solution of this utility model: the radio frequency distribution unit supports a 4-channel input and a 16-channel output configuration, and can perform time-division testing of two sets of SIP components simultaneously.

[0016] As a further technical solution of this utility model: the four-channel power combiner (C1) is packaged with a coaxial connector, operates at a frequency of 0.3-40GHz, and realizes power combining of four excitation signals.

[0017] As a further technical solution of this utility model: the SP4T switch module (SW5) is a DC-40GHz load type SP4T switch, which connects two sets of SIP component receiving channels.

[0018] As a further technical solution of this utility model: the interface of the front panel includes multiple RF connector types such as SMA, 2.92mm and 1.85mm.

[0019] In summary, this utility model has at least one of the following beneficial technical effects:

[0020] This utility model discloses an RF distribution unit for testing Ka-band SIP components, which plays an important role in SIP component testing systems. The solution provides an innovative structural design that offers multi-source anti-interference testing and second harmonic testing capabilities, thereby achieving automated testing of Ka-band SIP components. It supports parallel testing of two SIP components, reducing repeatability errors from manual operation. Programmable switching of the RF distribution unit significantly improves testing efficiency, and optimization of the internal structure effectively reduces costs. Therefore, this approach, as a technical concept and method for automated testing of Ka-band SIP components, has significant research and application potential and practical value. Attached Figure Description

[0021] Figure 1 This is the overall design block diagram of this utility model.

[0022] Figure 2 This is a schematic diagram of the 67GHz SP8T switch of this utility model.

[0023] Reference numerals: C1, four-channel power combiner; SW1, DPDT switch module; SW2, SPDT switch module; SW3 / SW4, SP8T switch module; SW5, SP4T switch module; SW6, SP5T switch module; SW7, SP2T switch module; SW8, SP8T switch. Detailed Implementation

[0024] The technical solutions in 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, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0027] Example 1:

[0028] Reference Figure 1 and Figure 2 This utility model discloses a radio frequency distribution unit for testing Ka-band SIP components, including a four-channel power combiner C1, a DPDT switch module SW1, an SPDT switch module SW2, two sets of SP8T switch modules SW3 / SW4, an SP4T switch module SW5, an SP5T switch module SW8, and an SP2T harmonic-specific switch module SW7.

[0029] The input of the four-channel power combiner C1 is connected to an external excitation source, and the output is connected to the SPDT switch module SW2, SP4T switch module SW5, and SP5T switch module SW8 respectively through the DPDT switch module SW1. The SPDT switch module SW2 is connected to two sets of SP8T switch modules SW3 / SW4 in a time-division manner to select the transmit channel, and the SP4T switch module SW5 is connected to the receive channel. The SP5T switch module SW8 is connected to the noise figure measurement port of the vector network analyzer through the SP2T harmonic dedicated switch module SW7.

[0030] The SP5T switch module SW8 consists of a 67GHz SP8T switch matrix formed by cascading four SPDT load-type switches and three SPDT non-load-type switches. Two sets of SP8T switch modules SW3 / SW4 are DC-40GHz load-type SP8T switches, supporting time-division multiplexing of transmit parameters for two 8-channel SIP components. The SP2T harmonic-dedicated switch module SW7 operates at a DC-67GHz frequency and shares a vector network analyzer port with the SP5T switch module SW8 to achieve second harmonic measurement. The RF distribution unit has a system isolation ≥50dB@40GHz, a port VSWR ≤2.0, and a maximum power handling capacity (1W DC-40GHz).

[0031] The RF distribution unit adopts a 4U shielded chassis structure. The front panel is divided into fixture and test interface areas, with silkscreen markings next to each interface. The front panel interfaces include SMA, 2.92mm, and 1.85mm RF connectors. The RF distribution unit supports a 4-channel input and 16-channel output configuration, enabling simultaneous time-division testing of two sets of SIP components. The four-channel power combiner C1 is a coaxial connector package, operating at a frequency of 0.3-40GHz, and performs power combining of four excitation signals. The SP4T switch module SW5 is a DC-40GHz load-type SP4T switch, connecting the receiving channels of the two sets of SIP components.

[0032] Taking into account the actual testing needs of SIP components, a dedicated harmonic testing channel is provided, offering 2-channel input and 8-channel output testing capabilities, covering a frequency range of 65GHz to meet the harmonic testing scenarios of the products under test. For the multi-channel multi-beam amplitude and phase characteristics, channel gain, channel attenuation, standing wave ratio, in-band ripple, output compression point, noise figure and other indicators of SIP components, a 4-channel input and 16-channel output interface is provided, supporting time-sharing testing of 2 sets of products; solving the problem of rapid, efficient and accurate testing of key technical indicators of multi-channel multi-beam TR.

[0033] The RF distribution unit is designed as a 4U shielded chassis with an aluminum alloy front panel and a sheet metal chassis, resulting in a robust and lightweight structure with a powder-coated finish. Considering the overall system height and ease of wiring, the main external interfaces of the RF distribution unit are located on the front panel of the chassis, divided into clamp terminals and test terminals according to the signal interaction targets. Each interface is clearly marked for easy identification, facilitating quick and accurate cable connections. Its operating principle is outlined below. Figure 1 As shown.

[0034] To achieve interference immunity and harmonic measurement for Ka-band SIP components, the specific design concept of this RF distribution unit is as follows:

[0035] C1 is a four-channel power combiner in a coaxial connector package. It covers a frequency range of 0.3GHz to 40GHz and is used to combine four external input signals of different frequencies as excitation for anti-interference testing. The external interfaces are connected to external excitation signal sources.

[0036] SW1 is a DPDT switch module with a frequency range of DC to 40GHz. It serves as an internal link selection element and is terminated by C1, SW2, SW5 and SW8 respectively. It can be used for bidirectional selection of transmit and receive channels.

[0037] SW2 is an SPDT switch module with a frequency range of DC to 40GHz. It is terminated by SW1 and SW3 and SW4 switch modules respectively. It can connect the signals of SW3 and SW4 switches in a time-division manner to perform multi-channel signal gating and switching.

[0038] SW3 and SW4 are SP8T switch modules with a frequency range of DC to 40GHz. They are respectively connected to the SIP component transmit channels and are internal load-type switches, which can perform time-division measurement of the transmit parameters of two 8-channel SIP components.

[0039] SW5 is an SP4T switch module with a frequency range of DC to 40GHz. It terminates two sets of SIP component receiving channels and is a load-type switch that can perform time-division measurement of the parameters of two SIP components.

[0040] SW6 is an SP5T switching module with a frequency range of DC to 40GHz. It is terminated with SW1 and SW7 respectively for power measurement, channel measurement and noise figure measurement.

[0041] SW7 is an SP2T switch module with a frequency range of DC to 67GHz. It has ports SW8 and SW6 as dedicated harmonic measurement channels. Together with SW8, it also multiplexes the noise figure measurement port of a vector network analyzer.

[0042] SW8 is an SP8T switch with a frequency range of DC to 67GHz. It is designed using a cascaded configuration, consisting of four SPDT load-type switch modules and three SPDT non-load-type switch modules. (See diagram). Figure 2 As shown.

[0043] The RF distribution unit distributes the excitation signal to the transmit or receive port of the device under test (DUT) according to different test items, and sends the DUT signal from the transmitter or receiver to test equipment such as the vector signal analysis unit and power analysis unit. Its design focuses on minimizing switch insertion loss while ensuring isolation between test channels to avoid interference.

[0044] This embodiment provides a test RF distribution unit for SIP components operating in the Ka band. The switching matrix frequency supports 0.3GHz to 67GHz, isolation ≥50dB@40GHz, port VSWR ≤2.0, supports 4 input channels and 16 output channels, supports time-division testing of 2 sets of products, has a maximum power handling capacity of 1W (DC to 40GHz), and has 4-channel multi-source anti-interference testing and dedicated harmonic testing functions.

[0045] The implementation principle of this utility model is as follows: This utility model discloses an RF distribution unit for testing Ka-band SIP components, which plays an important role in SIP component testing systems. The solution provides an innovative structural design that can provide multi-source anti-interference testing and second harmonic testing functions, thereby realizing automated testing of Ka-band SIP components. It supports parallel testing of two SIP components, reducing repeatability errors from manual operation. Through programmable switching of the RF distribution unit, testing efficiency is greatly improved, and through optimization of the internal structure, costs are effectively reduced. Therefore, this method, as a technical approach and method for automated testing of Ka-band SIP components, has significant research and application potential and certain application value.

[0046] The embodiments described herein are preferred embodiments of this utility model and are not intended to limit the scope of protection of this utility model. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A radio frequency distribution unit for testing Ka-band SIP components, characterized in that, It includes a four-channel power combiner (C1), a DPDT switch module (SW1), an SPDT switch module (SW2), two sets of SP8T switch modules (SW3 / SW4), an SP4T switch module (SW5), an SP5T switch module (SW6), an SP2T harmonic-specific switch module (SW7), and an SP8T switch (SW8). The input of the four-channel power combiner (C1) is connected to an external excitation source, and the output is connected to the SPDT switch module (SW2), the SP4T switch module (SW5), and the SP8T switch (SW8) respectively through the DPDT switch module (SW1). The SPDT switch module (SW2) is time-division connected to two sets of SP8T switch modules (SW3 / SW4) for transmitting channel selection, and the SP4T switch module (SW5) is connected to the receiving channel; The SP8T switch (SW8) is connected to the noise figure measurement port of the vector network analyzer via the SP2T harmonic dedicated switch module (SW7).

2. The RF distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The SP8T switch (SW8) consists of a 67GHz SP8T switch matrix formed by cascading four SPDT load-type switches and three SPDT non-load-type switches.

3. The RF distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The two sets of SP8T switch modules (SW3 / SW4) are DC-40GHz load-type SP8T switches, supporting time-division measurement of the transmit parameters of two 8-channel SIP components.

4. The radio frequency distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The SP2T harmonic dedicated switch module (SW7) operates at a frequency of DC-67GHz and shares a vector network analyzer port with the SP8T switch (SW8) to achieve second harmonic measurement.

5. The RF distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The radio frequency distribution unit has a system isolation of ≥50dB@40GHz, a port VSWR of ≤2.0, and a maximum power handling capacity of 1W (DC-40GHz).

6. The RF distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The radio frequency distribution unit adopts a 4U shielded chassis structure. The front panel is divided into clamp end and test end interface areas, and silkscreen markings are set next to each interface.

7. The RF distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The radio frequency distribution unit supports a 4-channel input and 16-channel output configuration, and can perform time-division testing of two sets of SIP components simultaneously.

8. The RF distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The four-channel power combiner (C1) is packaged with a coaxial connector, operates at a frequency of 0.3-40GHz, and realizes power combining of four excitation signals.

9. The radio frequency distribution unit for testing Ka-band SIP components according to claim 1, characterized in that, The SP4T switch module (SW5) is a DC-40GHz load-type SP4T switch that connects to the receiving channels of two sets of SIP components.

10. A radio frequency distribution unit for testing Ka-band SIP components according to claim 6, characterized in that, The front panel interfaces include various RF connector types such as SMA, 2.92mm, and 1.85mm.

Images