Engineering topics
Publications and source records attributed to Mailloux, R. J..
Antenna includes two sets of linearly polarized elements. Each set contains slots in parallel array. Sets are mutually orthogonal and are driven in phase quadrature. By changing lengths of slots or their separations, antenna beamwidth can be changed over wide range. Similar results are achieved with dipole configuration.
Circuit separates out, from multiplied signals, antenna element signals which have desirable phase angles and feeds them to appropriate antenna elements of phased array. System may be used in either transmitting or receiving mode.
A phase control coupling circuit for use with a phased array antenna is described. The coupling circuit includes a combining circuit which is coupled to a transmission line, a frequency multiplier circuit which is coupled to the combining circuit, and a recombining circuit which is coupled between the frequency multiplier circuit and phased array antenna elements. In a doubler embodiment, the frequency multiplier circuit comprises frequency doublers and the combining and recombining circuits comprise four-port hybrid power dividers. In a generalized embodiment, the multiplier circuit comprises frequency multiplier elements which multiply to the Nth power, the combining circuit comprises four-part hybrid power dividers, and the recombinding circuit comprises summing circuits.
Thin perfectly conducting fences used to reduce mutual coupling of two parallel plane waveguides
The slotted antenna structure discussed in this tech brief radiates a circularly polarized beam pattern over a wide angle. The basic structure, composed of waveguide slots, can be flush mounted in an airplane or spacecraft, and could be used in the communication link between an airplane and an air traffic satellite.
Antenna phasing circuit is described with the following advantages - 1/ increased number of phased elements, 2/ current repetition for each array element, 3/ circuit simplicity, and 4/ accurate phase interpolation. This circuit functions with Huggins Scan or with nearly any other phasing system.
Phase interpolation circuits for scanning phased arrays
Apparatus for generating microwave signals at progressively related phase angles for driving antenna array
Phase interpolation circuits for scanning phased array antennas, using doublers and frequency multipliers
Mutual coupling between waveguides radiating through conducting ground planes with orthogonally polarized propagating modes described by first order analysis
First-order solutions for mutual coupling between waveguides which propagate two orthogonal modes
Simple antenna with good circular polarization over wide space sector, showing geometry, normalized orthogonal field distributions and beamwidth range, considering slot combinations
Radiating collinear open ended waveguides and near field coupling analyzed using simultaneous integral equations and Fourier series expansion of aperture field
Fourier series expansion of simultaneous integral equations for collinear coupled waveguides radiating through common perfectly conducting ground plane
Microwave antenna array phasing device with one phase shifter per scan direction, using IF frequency multiplication and heterodyning
Waveguide bridge technique for measuring phase of coupled signal between two loosely coupled antennas