A microwave antenna assembly (30) comprises a feedline (32) including an inner conductor (44), an outer conductor (42), and a first dielectric (46) disposed between the inner and outer conductors. A radiating portion (38) is mechanically coupled to the feedline via compression (74,76). The radiating portion (38) is electrically connected to the inner conductor. A second dielectric (62) separates at least a portion of the radiating portion from contact with the outer conductor (42).
