Patent ID: 7271576

Claim:
A handheld self-contained digital antenna and/or network analyzer included within a rectangular shaped box, the analyzer having a net weight of approximately less than two pounds with a center of gravity at a region of the box intended to be grasped by a user's first hand and comprising: a hybrid coupler for directly measuring complex impedance values of a device under test at a given frequency, a direct digital synthesis generator (DDS) for generating the given frequency, a plurality of user-operable input devices, a multimode digital processor unit connected to the plurality of user-operable input devices, for controlling the DDS and including an analog to digital converter and a multiplexer connected to the four-part hybrid coupler, the digital processor unit for calculating and putting out a plurality of data results from data measurements made at the hybrid coupler, a transreflective color graphic display unit controlled by the digital processor unit for receiving at least selected ones of the plurality of data results and for providing a plurality of real time graphic displays of the data results in a plurality of user-selectable graphic formats including a Smith Chart graphic format and at least one additional rectangular or polar graphic format, and having a screen display element visible through a window defined by a front major surface of the box, the plurality of user-operable input devices presented at an endwall of the box adjacent to the screen display element for manipulation by a second hand of the user at a location away from the region at which the box is intended to be grasped, such that at least some ones of the input devices are each physically located to be in association with a corresponding input function display box presented by the screen display element, and a battery power supply for powering the analyzer.