Novel capacitive loaded broadband compact-fed bipolar butterfly oscillator

Abstract

The invention discloses a novel compact-fed capacitive loaded broadband bipolar butterfly oscillator, which comprises butterfly oscillators, rigid coaxial lines, grounding cylinders, a micro-strip feeding panel, a bottom plate and a parasitic metal sheet. The bottoms of the rigid coaxial lines and the grounding cylinders are fixedly arranged on the bottom plate. The two pairs of butterfly oscillators are fixedly installed at the top of the rigid coaxial lines and the grounding cylinders in a cross shape, and the micro-strip feeding panel is located above the butterfly oscillators. The micro-strip feeding panel is formed by pressing two layers of PCBs. Each layer of PCB is printed with a feeding metal strip. The outer walls of the rigid coaxial lines are grounded. One end of a coaxial innerprobe in each rigid coaxial line is connected with one end of one feeding metal strip, the other end of the feeding metal strip is electrically connected with a metal oscillator arm on the groundingcylinder corresponding to the rigid coaxial line, and the other end of the inner probe is connected to an SMA joint under the bottom plate. The parasitic metal sheet is arranged above the micro-stripfeeding panel. The problem of bandwidth limitation of compact-fed broadband bipolar butterfly oscillators is solved.

Description

technical field [0001] The invention relates to the field of broadband dual-polarized butterfly oscillators, in particular to a novel capacitively loaded broadband tight-fed dual-polarized butterfly oscillator. Background technique [0002] At present, the research and development of general-purpose equipment can greatly reduce R&D costs, improve industrial efficiency, and promote the development of interdisciplinary and cross-field technology integration. The butterfly dipole antenna has a wide range of applications and is suitable for many fields such as communication, radar, and radio astronomy. However, the broadband dual-polarized butterfly oscillator has a key factor that limits the bandwidth. The lower height H from the ground will produce good radiation performance at high frequencies, but the reflection coefficient will decrease; the distance from the ground to about 1 / 4 of the low-frequency wavelength The height H has a better reflection coefficient, but the high-...

AI Technical Summary

Problems solved by technology

However, the broadband dual-polarized butterfly oscillator has a key factor that limits the bandwidth. The lower height H from the ground will produce good radiation performance at high frequencies, but the reflection coefficient will decrease; the distance from the ground to about 1 / 4 of the low-frequency wavelength The height H has a better reflection coefficient, but the high-frequency pattern shows lobes and a drop in gain at θ=0°

Images