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A curved photonic band gap (PBG) unit cell loaded bent differential line is proposed to suppress the differential‐to‐common mode conversion noise. The PBG unit cell, loaded at the bend is designed and optimized to provide the required delay characteristic on the inner transmission line of a differential line. An LC equivalent circuit of curved PBG unit cell is proposed and constituent lumped element parameters are calculated. The realized PBG loaded bent differential line exhibits a measured mode conversion noise below −20 dB from DC to 6 GHz demonstrating a common mode noise suppression of around 9 dB.

Modulator plays crucial role in any pulsed grid tube based system. The design of the modulator becomes very crucial when it is employed for airborne applications. This paper describe the design of the low pulse width (approximately 300 ns) floating deck modulator. As this power supply and modulator was to float at high voltage around 40 KV, this development has also involved the selection of insulating material within the restricted weight and volume for airborne applications. To achieve high electrical insulation special potting techniques were used.

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