Microstrip line tuning circuit and base station antenna
A technology for tuning circuits and base station antennas, applied to circuits, antennas, antenna components, etc., can solve problems such as standing waves, isolation and other circuit parameters that are difficult to meet standards, radiation pattern influence, and front-to-back ratio variation, etc., to achieve easy batch implementation , shorten the design cycle, and flatten the peak effect
Pending Publication Date: 2020-04-10
GUANGDONG SHENGLU TELECOMM TECH
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Problems solved by technology
Not only the standing wave, isolation and other circuit parameters are difficult to meet the standard, but the radiation pattern will also be seriously affected, causing problems such as gain reduction, waveform distortion, sidelobe suppression and front-to-back ratio deterioration
Method used
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Embodiment 1
[0032] Such as figure 1 As shown, a microstrip line tuning circuit is a single-layer PCB circuit board composed of three parts: a copper-clad microstrip line 1 on the front, a dielectric board 2 and a copper-clad floor 3 on the back. The third-order intermodulation index of the PCB circuit board within the design working frequency is better than -120dBm (two 43dBm carrier inputs), the thickness of the dielectric board is 0.5-1.5mm, and the thickness of the copper clad is 0.035±0.005mm, so as to meet the requirements of the base station antenna Requirements for power capacity and passive intermodulation indicators. In addition, in order to improve the consistency of batch production, the dielectric board 2 adopts boards and manufacturing processes with high stability and small batch differences.
[0033] combine figure 2 As shown, the front copper-clad microstrip line 1 consists of an input pad 1-1, an output pad 1-2, an input impedance transformation section 1-3, an output ...
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Abstract
The invention discloses a microstrip line tuning circuit which is composed of a single-layer PCB circuit board, and the single-layer PCB circuit board is composed of a front copper-clad microstrip line, a dielectric plate and a back copper-clad floor. The front copper-clad microstrip line comprises an input bonding pad, an output bonding pad, an input impedance conversion section, an output impedance conversion section and a resonator which are connected in parallel, the resonator is composed of a plurality of open circuit branches, the resonator eliminates the impedance discontinuity phenomenon caused by electromagnetic mode conversion near a corresponding frequency point of the ultra-wideband radiation unit through anti-resonance, and then the purpose of expanding the impedance bandwidthis achieved. The fact that base station antenna radiation units which are most widely applied at present basically work below a three-order mode is considered, the microstrip line tuning circuit is theoretically adaptive to almost all radiation units by optimizing to a proper resonant frequency, so that the impedance bandwidth is remarkably improved. The invention also provides a base station antenna.
Description
technical field [0001] The invention relates to the technical field of radio frequency tuning circuits, in particular to a universal ultra-broadband base station antenna (sub-6GHz) radiation unit impedance matching circuit and a realization method. Background technique [0002] Wireless communication has entered the 5G era. With the development and utilization of new spectrum resources such as n74 (1427-1518MHz) and n71 (617-698MHz), higher requirements are placed on the working bandwidth of base station antennas (sub-6GHz). At the same time, the miniaturization and integration of base station antennas is the only way to solve the increasingly serious problems of sector crosstalk and shortage of site resources in dense networking environments. The base station antenna must meet relatively strict pattern indicators and circuit indicators such as standing waves, isolation, and passive intermodulation within the working bandwidth. On the one hand, the ultra-wideband makes it v...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H01Q5/335H01Q5/50H01Q5/28H01Q5/10H01Q1/24
CPCH01Q1/246H01Q5/10H01Q5/28H01Q5/335H01Q5/50
Inventor 丁文丁元良杨华
Owner GUANGDONG SHENGLU TELECOMM TECH