in this array 100 are oriented vertically in the same direction as the electric field vector the electric field vector of course is oscillating at 2 450 mhz so that it is alternately pointing upwardly and downwardly 2 45 billion times a second this oscillating field vector induces an alternating current in the vertical diode leads 103 at the same frequency the diodes 101 rectify this microwave alternating current to pulsating direct current which appears at array leads 105 and 106 which are polarized respectively negative and positive horizontal array leads 105 and 106 each pass through an opening 107 to a small cylindrical chamber 110 containing an electrically conducting metal disc 111 on the array leads which serves to remove any microwave frequency component and exclude its passage into the interior of the metal housing 29 this metal disc 111 within cylindrical chamber 110 is therefore a microwave bypass device metal disc 111 may have dielectric disc 112 on either side of it for electrical insulation likewise array leads 105 and 106 may have insulators about them in the form of dielectric bushings 113 shown in fig9 in openings 107 facing the inside of the cavity 60 and dielectric bushings 114 in openings 108 facing the outside of the cavity 60 the dielectric discs and bushings prevent electrical arcing and allow use of a smaller separation than would be required with an air gap only the rectified direct current and low frequency 34 ripples 34 typically 60 hz or 120 hz from the line current used to power the microwave oven 10 are passed through cylindrical chamber 110 and into the interior of metal housing 29 a filter capacitor 120 smoothes the 34 ripples 34 in the direct current to provide smoothed current.