Ultra-wideband high-precision fixed attenuator
A fixed attenuator, high-precision technology, applied in the direction of electrical components, multi-terminal pair network, impedance network, etc., can solve the problems that affect the high-frequency attenuation accuracy of the fixed attenuator, the additional loss of signal power, and the deterioration of port standing wave performance. Achieve the effect of increasing inductance, reducing high-frequency loss, and port standing wave
Pending Publication Date: 2022-07-05
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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Problems solved by technology
However, this structure also has many problems in ultra-wideband applications. There are a large number of parasitic effects in the passive attenuator. With the increase of the operating frequency, the resistance in the signal path will generate large capacitive parasitics, resulting in additional signal power. At the same time, the metal interconnection at high frequency will also show transmission line effect, which affects the high frequency attenuation accuracy of the fixed attenuator
Fixed attenuators are mostly micro-assembled by gold wire bonding, and the parasitic effect generated by the PAD point will make the standing wave performance of the port worse
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[0017] Hereinafter, the present invention will be further described with reference to the accompanying drawings and specific embodiments.
[0018] In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the accompanying drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present invention, which are not suitable for those skilled in the art. In other words, on the premise of no creative work, other drawings can also be obtained based on these drawings.
[0019] refer to figure 1 In view of the shortcomings of the traditional bridge T-type fixed attenuation scheme, the flatness of the attenuation curve and the port standing wave performance are difficult to ensure in ultra-wideband applications, and an ultra-wideband high-precision fixed attenuator of the same type is innovatively proposed.
[0020] like figure 2 Shown is the innova...
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The invention discloses an ultra-wideband high-precision fixed attenuator, and belongs to the technical field of power attenuators. The resistor comprises a first resistor, a second resistor, a third resistor, a fourth resistor, a first bonding pad and a second bonding pad, the first bonding pad is respectively connected with the resistor and the third resistor, the other end of the first resistor is connected with the second bonding pad, the other end of the third resistor is connected with one end of the fourth resistor, and the other end of the fourth resistor is connected; an intersection point of connecting lines of the third resistor and the fourth resistor is connected with one end of the second resistor, and the other end of the second resistor is grounded; the circuit is characterized by further comprising a plurality of series resistors, each series resistor is connected with the first resistor in parallel, the other end of the second resistor is connected with one end of an inductor, and the other end of the inductor is grounded. Attenuation flatness and good standing wave characteristics of the attenuator in an ultra-wide band are achieved, and the attenuator can be widely applied to various radio frequency and millimeter wave circuit products.
Description
technical field [0001] The invention relates to the technical field of power attenuators, in particular to an ultra-wideband high-precision fixed attenuator. Background technique [0002] The power attenuator is a device that attenuates the power level of the input signal to control the amplitude / power of the signal transmitted by the circuit. Ultra-wideband attenuators are used in phased array radar systems, broadband electronic countermeasures and broadband microwave synthesis scanning signals. It is widely used in measuring instruments such as generators: for example, the T / R component in the phased array system uses attenuators to achieve amplitude control and gain equalization of multi-beam signals; at the input end of the test instrument, it can be adjusted through the attenuator Signal strength to avoid damage to the measuring instrument due to too much input signal power; it can also be used to improve the standing wave ratio of each node in the transmission link. ...
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IPC IPC(8): H03H7/24
CPCH03H7/24
Inventor 魏恒杨格亮赵建欣刘子奕周媛
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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