Electrodeless light source utilizing a lamp termination fixture having parallel capacitive impedance matching capability

A light source including:

• a. a source of power at a high frequency,
• b. an electrodeless lamp having an envelope made of a light transmitting material and a volatile fill material within the envelope, the fill material emitting light upon breakdown and excitation, and
• c. a termination fixture coupled to the source, the fixture including an inner conductor and an outer conductor disposed around the inner conductor, the first ends of the conductors being coupled to the lamp so that the lamp forms a termination load for the fixture, the second ends of the conductors being coupled to the source, the conductors having dimensions in length and cross section such that the fixture impedance matches the real component of the complex impedance of the lamp during excitation to the output impedance of the source, the fixture further including a reactive impedance device disposed in the fixture in the region between the conductors near the second end for compensating for the reactive part of the lamp complex impedance, whereby the input impedance of the fixture during the excited state of the lamp is matched to the impedance of the coupled source.