Abstract: A variable feedback and tuning capacitor, which is fabricated from a brac with bendable metallic prongs, is attached to the input transmission line of a microwave transistor amplifier. The prongs are placed in close proximity to the collector pad metalization of the carrier and provide a convenient and novel means for RF tuning the amplifier after the transistor is carrier mounted and DC tested.

Abstract: At least one but preferably two shorted transmission line antenna sections, ach comprised of a vertical member shorting a horizontal printed circuit transmission line member to a ground plane with the transmission lines being adjustable in length for tuning by utilization of a flexible braid transmission line member connected between the printed circuit transmission line member and a take-up spindle which is adapted to be rotated and accordingly wind or unwind the braid member thereon. The feed point is at the connection of a pair of fixed capacitors, one of which is connected to ground plane while the other is connected to the take-up spindle.

Abstract: A ceramic package is disclosed which comprises a frame member having an ature for accommodating a crystal resonator. The frame member includes mounting clips for supporting the crystal resonator in a desired vibratory mode. A bottom and top lid are then fastened to the frame to enclose the crystal to also enable hermetic sealing in an ultra high vacuum without the use of large deleterious forces.The package provides a hermetic enclosure enabling improved frequency stability and overall reliability.