Miniaturized dual-frequency omnidirectional helical antenna

The invention discloses a missile-borne miniaturized helical antenna which is mainly composed of a ceramic dielectric rod, a helical main arm, a grounding branch knot, a parasitic helical arm and a floor. The ceramic dielectric rod is made of a ceramic material with a high dielectric constant, the helical main arm, the grounding branch knot and the parasitic helical arm are arranged at the outer end of the ceramic dielectric rod, and the helical main arm feeds at the bottom end of the helical arm through a coaxial probe. One end of the grounding branch knot is electrically connected with the floor, and the other end is connected to the helical main arm. The parasitic helical arm is not directly and electrically connected with the floor, and a new resonance point is introduced in an energycoupling manner, so that the double-frequency working characteristic is achieved. The invention provides the design method for realizing the dual-band work of the omnidirectional helical antenna, theproblems that the size of