IMPROVED ULTRA WIDE BAND NOTCH ANTENNA ASSEMBLY FOR RF COMMUNICATION EQUIPMENT

摘要

A planar antenna assembly (AA) for an RF communication module, comprises i) a conductive plate having a first linear side of a first length and in which is defined a first notch (N1) of a first width and a first electrical length, equal to a quarter of a wavelength corresponding to a chosen frequency of a working frequency band, and comprises a straight part having an open end (OE1) found on the first side, and a shortened end (SE1), and ii) a first feed line (FL1) defined above the conductive plate and across the first notch (N1) and arranged to be coupled to this first notch (N1) to enable wideband operation. The first length of the first side is equal to half this wavelength. Moreover, the first notch open end (OE1) is present approximately in the middle of the first side. Moreover, the first width of the first notch (N1) is chosen such that the proportion of energy stored in the fields associated with the first notch (N1) is low compared with the result of the chosen frequency times the power radiated from the currents propagating around the first notch.