A soft board-board millimetre wave subarrayed Van Atta antenna has been designed fabricated and measured for asset tracking applications at 62GHz. Soft-board, 254 µm thickness and 2.19 relative permittivity, single and array patch antennas were designed and characterised. The elements and arrays are designed to be connected via microstrip to WR-15 waveguide transitions. Measurements of insertion loss for the transition have been performed and the transition used to allow patch array and subarray absolute gain values to be computed. The performance of the Van Atta Array is also given and peculiarities of its performance at mm-wave frequencies described. The characteristics of a millimetre wave integrated Silicon antenna are discussed also. The frequencies chosen for this work are 62.5 and 65.5 GHz. These are transmit and receive frequencies allocated for broadband Mobile wireless applications [1].
This paper reports a novel MMIC sampler based on NLTL technology which has been designed using the Philips ED02AH process. The sampling MMIC can be used to measure waveforms in the (3-+34) GHz bandwidth. A tapered microstrip based NLTL pulse generator has been combined with a diode-resistor bridge to minimize on GaAs real estate compared to CPW methodology. The advantage of the designed sampling MMIC is wide bandwidth, compressed size and consequently lower cost. The sampling MMIC finds application in sampling oscilloscopes and Time Domain Reflectometers (TDRs). A CPW based NLTL shock wave generator has also been designedfor comparison based on bonding several MMIC NLTL samples together.
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