Embedded tuning circuit board probe for testing radio frequency signals based on radio frequency-free test socket

Abstract

The invention relates to an embedded tuning circuit board probe for testing a radio frequency signal based on a radio frequency-free test socket. The embedded tuning circuit board probe is applied toa test system of the radio frequency-free test socket. The probe comprises a tuning assembly, the tuning assembly is electrically connected with a signal pin, the signal pin is connected with an antenna matching circuit of a mainboard to be tested, the tuning assembly is further provided with a connection port, and the connection port is used for connecting a radio frequency test cable and a control line of the tuning assembly and is connected with an external test instrument through the radio frequency test cable, a control line of the tuning assembly is used for receiving a control signal, so that impedance matching is performed between the tuning assembly and the antenna matching circuit, the purpose of omitting a radio frequency test seat is achieved; the tuning assembly is embedded inthe radio frequency test needle, and the signal needle and the connection port are connected to the tuning assembly, so that the resistance and interference caused by the radio frequency test probe and the radio frequency line are reduced, the operation complexity of impedance matching of the whole path is reduced, the adjustment time and the verification time are saved, and the effectiveness ofthe detection effect is ensured, the structural size is reduced, and the application is convenient.

Description

technical field

[0001] The invention relates to the technical field of radio frequency signal testing, in particular to an embedded tuning circuit board probe for testing radio frequency signals based on a non-radio frequency test socket. Background technique

[0002] In recent years, with the continuous development of communication technology, the popularity of wireless products has become higher and higher, and the number of wireless products produced in the world is also increasing every year, and people's production and life are becoming more and more convenient. Wireless products (represented by mobile phones) mainly refer to the communication frequency of 300kHz ~ 300GHz, and the communication signals in this frequency range are also called radio frequency signals. In order to ensure the quality of the RF signal on the motherboard of wireless products and meet a series of the most basic wireless communication requirements of wireless products, it is usually necessary t...

Examples

Embodiment 1

[0072] see Figure 12 , the figure shows the specific circuit form of the antenna matching circuit and tuning components of a certain brand of wireless product motherboard, PORT1 represents the RF chip end, PORT2 represents the test instrument end, and the antenna shrapnel (ANT CLIP CONTACT) to PORT1 is the antenna matching The circuit is composed of capacitor C2 and inductor L3. The circuit between the antenna shrapnel and PORT2 is a tuning component, from Figure 9 It can be seen that the circuit of the tuning component and the antenna matching circuit are matched together to form a dual-port symmetrical structure network, and the purpose is to ensure the symmetry of the RF S parameters of port 2 (PORT2) and port 1 (PORT1). Since the antenna supports the two frequency bands N78 and N79 at the same time, according to the composition of the wireless product antenna matching circuit (capacitor C2 and inductor L3), after debugging, it is found that it is necessary to use single-...

Embodiment 2

[0089] see Figure 17 , Figure 23-25 , Figure 17 There are three circuit parts, ABC, respectively, and the C part circuit is the antenna matching circuit of the wireless product motherboard (4G antenna). The matching form used in the frequency band, that is, when the circuit of part C is changed, the circuits of parts A and B are adjusted to achieve the overall symmetrical form of ABC. After debugging, it is found that the single-pole double-throw RF switches U4 and U5 in the B frame need to be used to switch the π-type tuning circuit series adjustable capacitor C224, and the single-pole four-throw RF switches U6 and U7 in the B frame need to be used. In order to ensure symmetry, the values ​​of the components switched to the ground must be the same for the switching of the component values ​​on the two branches connected in parallel to the ground of the tuning circuit.

[0090] When the RF chip works in the B5 frequency band (824-894MHz), the single-pole double-throw switc...

Embodiment 3

[0101] see Figure 20-22 , since the symmetrical form of the circuit can be composed of a variety of components selected and arranged in specific settings, it should not be understood that the implementation of the present invention is limited to the examples in the description, such as the commonly used T-type and π-type symmetrical network forms. According to the number of components, it can also be divided into one-stage parallel π-type, three-stage π-type and three-stage T-type, and the tuning components mentioned in the present invention include but are not limited to the above-mentioned forms.

[0102] The advantages of the present invention are:

[0103] 1) By using the present invention, the radio frequency test socket can be directly omitted, and the tuning component with impedance matching function is embedded in the package shell, welded on the tuning component through the signal pin, and directly contacts the antenna shrapnel through the signal pin to form a path; ...

technical field

[0001] The invention relates to the technical field of radio frequency signal testing, in particular to an embedded tuning circuit board probe for testing radio frequency signals based on a non-radio frequency test socket. Background technique

[0002] In recent years, with the continuous development of communication technology, the popularity of wireless products has become higher and higher, and the number of wireless products produced in the world is also increasing every year, and people's production and life are becoming more and more convenient. Wireless products (represented by mobile phones) mainly refer to the communication frequency of 300kHz ~ 300GHz, and the communication signals in this frequency range are also called radio frequency signals. In order to ensure the quality of the RF signal on the motherboard of wireless products and meet a series of the most basic wireless communication requirements of wireless products, it is usually necessary t...

Examples

Embodiment 1

[0072] see Figure 12 , the figure shows the specific circuit form of the antenna matching circuit and tuning components of a certain brand of wireless product motherboard, PORT1 represents the RF chip end, PORT2 represents the test instrument end, and the antenna shrapnel (ANT CLIP CONTACT) to PORT1 is the antenna matching The circuit is composed of capacitor C2 and inductor L3. The circuit between the antenna shrapnel and PORT2 is a tuning component, from Figure 9 It can be seen that the circuit of the tuning component and the antenna matching circuit are matched together to form a dual-port symmetrical structure network, and the purpose is to ensure the symmetry of the RF S parameters of port 2 (PORT2) and port 1 (PORT1). Since the antenna supports the two frequency bands N78 and N79 at the same time, according to the composition of the wireless product antenna matching circuit (capacitor C2 and inductor L3), after debugging, it is found that it is necessary to use single-...

Embodiment 2

[0089] see Figure 17 , Figure 23-25 , Figure 17 There are three circuit parts, ABC, respectively, and the C part circuit is the antenna matching circuit of the wireless product motherboard (4G antenna). The matching form used in the frequency band, that is, when the circuit of part C is changed, the circuits of parts A and B are adjusted to achieve the overall symmetrical form of ABC. After debugging, it is found that the single-pole double-throw RF switches U4 and U5 in the B frame need to be used to switch the π-type tuning circuit series adjustable capacitor C224, and the single-pole four-throw RF switches U6 and U7 in the B frame need to be used. In order to ensure symmetry, the values ​​of the components switched to the ground must be the same for the switching of the component values ​​on the two branches connected in parallel to the ground of the tuning circuit.

[0090] When the RF chip works in the B5 frequency band (824-894MHz), the single-pole double-throw switc...

Embodiment 3

[0101] see Figure 20-22 , since the symmetrical form of the circuit can be composed of a variety of components selected and arranged in specific settings, it should not be understood that the implementation of the present invention is limited to the examples in the description, such as the commonly used T-type and π-type symmetrical network forms. According to the number of components, it can also be divided into one-stage parallel π-type, three-stage π-type and three-stage T-type, and the tuning components mentioned in the present invention include but are not limited to the above-mentioned forms.

[0102] The advantages of the present invention are:

[0103] 1) By using the present invention, the radio frequency test socket can be directly omitted, and the tuning component with impedance matching function is embedded in the package shell, welded on the tuning component through the signal pin, and directly contacts the antenna shrapnel through the signal pin to form a path; ...

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