Multi Functional Microstrip Spiral Antenna for Multiple-Band Operation Having Multi-Pattern Control

摘要

The present invention is based on multiple frequency bands by adjusting the phase difference between the power supply line is connected to control the phase shift in an spiral the shape of the beam relates to multi-functional microstrip spiral antenna that can be selected , in particular perpendicular to the antenna plane beam fixed at the lower frequency band , and a vertical beam at the upper frequency band , conical beam , such as a variety of different beam energy beam it is possible to obtain the pattern , and provides a multi-functional micro- strip antenna for a multi-band spiral having a different radiation pattern having a wide bandwidth of 10% or more in each frequency band .