Patent ID: 6249254
Filing Date: 2001-06-19
Classification: G06F,H01Q

Abstract:
A method of determining the physical dimensions of an antenna having a generally triangular radiating element, having a linear feedline, one end of which includes an apex-area that is defined by a linear extension of two inclined sides of said radiation element, and having a ground plane element that is electrically isolated from and that underlies only said feedline and said apex area, said antenna having an input feed of a known impedance that is connected to said feedline, the method comprising the steps of:selecting a desired center frequency of operation of said antenna;selecting a height of said radiating element as measured from said end of said feedline to a base line of said radiation element, wherein said height is selected as a function of the wavelength of operation of said antenna and said desired center frequency of operation;determining a width of said feedline that produces a feedline impedance that is less than said known input feed impedance;selecting an apex angle for said apex area;construct an antenna having physical dimensions in accordance with the above-defined steps;connecting a first electrical instrument to said input feed and energizing said antenna with a frequency band that includes said desired center frequency;using a second electrical instrument to determine a bandwidth of operation of said energized antenna; andadjusting said height of said radiating element and/or said width of said feedline to achieve a desired bandwidth of operation of said energized antenna wherein said desired center frequency is within said desired bandwidth of operation.