Unequal power directional coupler
A directional coupler and power technology, which is applied in the direction of waveguide devices, circuits, connecting devices, etc., can solve the problems of increased bridge area and difficult processing, and achieve the effects of reducing the size of the coupler, facilitating miniaturization, and facilitating processing
Active Publication Date: 2017-09-22
COMBA TELECOM TECH (GUANGZHOU) CO LTD
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Problems solved by technology
In general design, in order to increase the operating bandwidth, or to improve the directivity and standing wave of the directional coupler, a multi-level branch line structure is used, but this design method will cause the bridge area to increase, and the outermost part of the directional coupler The smaller the branch line admittance at the end, the narrower the line width, which makes processing difficult, thus limiting the further broadening of the frequency band
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[0034] The present invention will be further described below with reference to the accompanying drawings and exemplary embodiments, wherein the same reference numerals in the accompanying drawings all refer to the same components. Also, detailed descriptions of known arts will be omitted if they are unnecessary to illustrate the features of the present invention.
[0035] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the wording "comprising" used in the description of the present invention refers to the presence of said features, integers, elements and / or components, but does not exclude the existence or addition of one or more other features, integers, elements, components and / or combinations thereof. It will be understood that when an element is referred to as being "connected" or "coupled" to another element, it can be dire...
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The embodiment of the invention discloses an unequal power directional coupler. The unequal power directional coupler comprises a dielectric substrate and an electric bridge, wherein the electric bridge is arranged on a surface of the dielectric substrate and comprises a main line, an auxiliary line, a first branch line, a second branch line and a third branch line, the first branch line is electrically connected with first end parts of the main line and the auxiliary line, the second branch line is electrically connected with second end parts of the main line and the auxiliary line, two ends of the third branch line are electrically connected with middle positions of the main line and the auxiliary line, an L-shaped branch line with an adjustable included angle is arranged on the third branch line and is used for adjusting admittance of the third branch line, and the directional coupler is integratedly of a left-right asymmetric structure about the third branch line. By the directional coupler, the impedance matching bandwidth is increased on the conditions that more-level branch lines are not used and the size of the electric bridge is not increased, unequal output power is achieved, and the directional coupler is convenient to process.
Description
technical field [0001] The invention relates to the technical field of mobile communication, in particular to a directional coupler with unequal power division. Background technique [0002] Directional couplers have a wide range of applications in microwave technology, such as detecting power, frequency and spectrum; performing power distribution and synthesis. In the rapidly developing microwave integrated circuits and monolithic microwave integrated circuits, the directional coupler, as the core device in the microwave system, plays an indispensable role in microwave communication, so the performance of the directional coupler has become a constraint on system performance and technology level key. [0003] A common coupler is a three-branch directional coupler, and its structure is left-right symmetrical, see the attached figure 1 , is the schematic diagram of the three-branch directional coupler circuit. In the figure, 1, H, and G are the normalized characteristic admi...
Claims
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IPC IPC(8): H01P5/18
CPCH01P5/18
Inventor 王灿吕志煊陈强
Owner COMBA TELECOM TECH (GUANGZHOU) CO LTD