초록 ▼

An array antenna for direction-finding includes antenna elements which define a triangular outline well-suited for meeting space constraints or reducing reflections from mounting conditions associated with the array antenna. The actual geometric configuration of the antenna elements is limited to ce

An array antenna for direction-finding includes antenna elements which define a triangular outline well-suited for meeting space constraints or reducing reflections from mounting conditions associated with the array antenna. The actual geometric configuration of the antenna elements is limited to certain triangular configurations with corresponding geometric correction factors to maintain the accuracy of estimating the angle of arrival. A processing system determines the appropriate angle of arrival based upon differential phases received in the antenna elements and the appropriate geometric correction factor.

대표청구항 ▼

[ What is claimed is:] [13.]13. A dual-band antenna for direction finding of received signals, the antenna comprising:a first array for operating in a first frequency band, the first array having antenna elements arranged to define a first triangular outline with separations between the antenna elem

[ What is claimed is:] [13.]13. A dual-band antenna for direction finding of received signals, the antenna comprising:a first array for operating in a first frequency band, the first array having antenna elements arranged to define a first triangular outline with separations between the antenna elements;a second array for operating in a second frequency band different from the first frequency band, the second array having antenna elements arranged to define a second triangular outline with separations between the antenna elements;at least one measuring device measuring differential phases between the received signals induced in at least one pair of the antenna elements;a processor for determining a first angle of arrival of a first electromagnetic field of the first frequency band and for determining a second angle of arrival of a second electromagnetic field within a second frequency band, based upon the measured differential phases and at least one of a first geometric correction factor indicative of a gometric relationship between the antenna elements defining the first triangular outline and a second geometric correction factor indicative of a geometric relationship between the antenna elements defining the second triangular outline, at least one of the first and second electromagnetic fields inducing the received signals in the antenna elements.