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6175336 Structural endcap antenna  
A structural endcap antenna for a vertical tail of an aircraft. The endcap antenna comprises an outer skin having an inner surface and an antenna element disposed adjacent to the inner surface of...
H001913 Bi-blade century bandwidth antenna  
A Bi-Blade Antenna is disclosed which will radiate and receive multi-octave electromagnetic waveforms with century bandwidth (i.e. 100 to 1) using two blade antenna elements and a coaxial...
6087997 Apparatus and method for enabling the passage of signals through an antenna dish  
An antenna dish for reflecting signals for a first antenna operating in a first frequency band is mounted in proximity to a second antenna operating in a second frequency band separated from the...
6052078 Apparatus for overcoming the blockage effect of an object in the path of a radiating beam of RF energy  
Apparatus which overcomes the blockage effect of an object in the path of a beam of RF energy, includes a conformal array of parasitic electrical conductor elements having a length of about λ/3...
6020854 Artillery fuse antenna for positioning and telemetry  
An antenna for utilization in a fuse of an artillery shell is disclosed. The antenna comprises a radiator, a capacitance hat disposed at a first end of the radiator for capacitively loading the...
5991138 Method and apparatus for protecting aircraft electronics from lightning  
A lightning protection element is incorporated into the portion of an aircraft signal distribution system which connects an antenna to flight critical equipment. The lightning protection element...
5986611 Steerable disk antenna  
A radar antenna system, adapted to be supported on an aircraft for surveillance, employs a nonconducting disk radome structured with aerodynamic fairing and otherwise to produce relatively low...
5982339 Antenna system utilizing a frequency selective surface  
An antenna element is provided that includes a frequency selective surface (FSS) portion on its primary radiating/receiving surface. The antenna element is conductively or capacitively coupled to...
5974317 Cell-clustering arrangements and corresponding antenna patterns for wireless communication networks employing high-altitude aeronautical antenna platforms  
A multi-beam antenna for a wireless communication network, a method of creating cells for a wireless communication network with a multi-beam antenna held aloft by an aeronautical vehicle and a...
5969686 Retractable forward looking radome for aircraft  
A retractable forward looking radome assembly which extends from a recess in the undersurface of the aircraft is provided for housing and protecting one or more radar systems and orienting the...
5952976 Helicopter furnished with a high-frequency radiocommunication system  
The objective of the invention is to compensate for the attenuation, in a direction (X,X), of the radiation from an antenna (5) mounted on a helicopter (1), including elements (12) which disturb...
5952981 Antenna for reducing an effect of a radio wave blocking obstacle  
An array antenna is located on an upper surface of a vehicle. The array antenna is oriented at a right angle to a radio wave blocking obstacle existing in a radio wave transmission path. A...
5929816 Antenna mount for aircraft  
The antenna mount is for use in mounting a GPS antenna and a differential antenna on an aircraft. The antenna mount is fixed externally of the aircraft on an outer surface of a curved rear wall of...
5918834 Retractable sensor system for an aircraft  
A retractable sensor system (12) for an aircraft has a sensor (16) coupled to an actuation mechanism (18). The sensor (16) moves from a retracted position to an expanded position. A reinforced...
5905463 Linear array aircraft antenna with coning correction  
Aircraft-mounted Identification Friend or Foe (IFF) antennas employ a linear array of radiator elements positioned transverse to the boresight axis. With an azimuth determination capability, but...
5818393 Wide field-of-view fixed body conformal antenna direction finding array  
A fixed body wide field-of-view conformal antenna array suitable for broadband precision direction finding on missile platforms. The array is configured as multiple sub-arrays of spiral antennas...
5748152 Broad band parallel plate antenna  
A broadband flared slot notch antenna combined with an overhead metal plate resulting in an improved front-to-back ratio and a reduced response to crossed polarized radiation. The antenna is...
5745081 HF antenna for a helicopter  
Disclosed is a combined antenna and helicopter rotor blade. The antenna has one or more electrically non-conductive rotor blades, each having an electrical conductor positioned parallel to the...
5726664 End launched microstrip or stripline to waveguide transition with cavity backed slot fed by T-shaped microstrip line or stripline usable in a missile  
A low profile, compact microstrip-to-waveguide or stripline-to-waveguide transition. The end of the waveguide is terminated in a cavity backed slot defined in a groundplane formed on a dielectric...
5678171 Mobile receiver for satellite broadcast during flight  
A mobile receiver for satellite broadcast comprises directive antennas, a navigation unit for generating a navigation signal representing a position and an attitude of an airplane, a control unit...
5666128 Modular supertile array antenna  
An array antenna especially adapted for spacecraft use includes a support frame made up of intersecting beams which form an "eggcrate" of square openings. A plurality of subarrays or radiating...
5657032 Aircraft cellular communications antenna  
An elliptic-shaped cylindrical antenna radiating element having a first side and a second side includes a first rectangular slot disposed in the first side and a second port disposed in the second...
5633649 Radar system and components therefore for transmitting an electromagnetic signal underwater  
An antenna for transmitting electromagnetic signals having a frequency less than 500 Hz includes a beam of dielectric material and a conductive sheet wound in a helical pattern around the beam of...
5621421 Antenna and mounting device and system  
An antenna and mounting device assembly fits on opposite sides of an aircraft to handle radio signals during flight. The antenna has a boom and radiating elements extending normal to the boom. The...
5614908 Helicopter system with rotor blade antennas for landing assistance and for detection of electro-magnetic anomalies  
A system for assistance in landing a helicopter and for the detection of electro-magnetic anomalies utilizing helicopter blades as carriers of receiving devices in a wide spectrum of...
5592186 Sectional filter assembly  
A frequency selective device that consists of two or more frequency selective surfaces that are separately manufactured to exacting engineering tolerances. The two or more frequency selective...
5575438 Unmanned VTOL ground surveillance vehicle  
An unmanned aerial vehicle (UAV) has a toroidal fuselage and a rotor assembly having a pair of counter-rotating rotors secured in fixed coaxial combination with the toroidal fuselage to provide a...
5526008 Antenna mirror scannor with constant polarization characteristics  
An antenna mirror scanner for generating and directing an antenna scanner beam displaying constant polarization vectors. The antenna mirror scanner includes a non-rotating fixed-aperture antenna...
5461392 Transverse probe antenna element embedded in a flared notch array  
Low frequency radiating elements are embedded in a flared notch array. The flared notch array forms a series of parallel troughs in which absorptive loads are placed to reduce the antenna radar...
5434583 Communication with reentry vehicle through modulated plasma  
Signal antennae are mounted on the casing wall between forward nose and r tail ends of an aerospace launched vehicle for radio communication through a radiation conducting sheath of plasma formed...
5405107 Radar transmitting structures  
Internal conformal antenna arrays are mounted in aircraft aerosurface and fuselage primary and secondary load carrying structures. These radar transmitting structures are dual role structures...
5392053 Array antenna and system  
An array antenna to be mounted on curved portions of satellites, airplanes, ships, land moving objects, or the like, in which a base (31) on which a plurality of antenna elements (34) are arranged...
5389940 Antenna pointing mechanism  
An antenna pointing mechanism for a highly directional antenna which avoids the aforenoted problems. The mechanism including the antenna are rendered substantially immune to bending and...
5371508 Portable antenna test apparatus  
Portable antenna test apparatus has a test set positioned a determined distance from a number of antennas of an aircraft. A transmitting module of the test set contains low frequency, mid...
5369413 Q equalization in dual-element end-fire array antennas  
Mutual coupling effects, which would tend to degrade operation of a two-element end-fire array over a frequency band, are overcome by provision of an inter-element coupling impedance which is...
5357259 Aircraft deployable rotating phased array antenna  
A stacked Yagi phased array is located within a foil-shaped enclosure that is connected to a rotary joint which allows rotation of the antenna over 360° in azimuth. The radar is normally stored...
5325103 Lightweight patch radiator antenna  
A lightweight patch radiator phased array antenna having a single layer patch construction on an artificial dielectric, such as syntactic foam, which achieves a factor-of-ten weight savings over...
5323170 Radomes having vinyl foam core construction  
A radome constructed using a rigid or semi-rigid foam core and sandwich construction is described. The foam core radome virtually eliminates water absorption problems associated with present...
5315309 Dual polarization antenna  
A dual polarization antenna for use on an aircraft, preferably a helicopter or the like, permits practical and reliable high frequency radio communications in a severe non line of sight, nap of...
5278571 RF coupler for measuring RF parameters in the near-field  
An RF coupler is used to measure transmitted power and receiver sensitivity of an avionics RF transceiving system (e.g., a secondary radar transponder). The coupler physically mates with (e.g., by...
5276457 Integrated antenna-converter system in a unitary package  
Monolithic microwave integrated circuit (MMIC) technology is advantageously used to fabricate microwave circuitry for an antenna-converter system to enable an antenna and its associated converter...
5264064 Method and system for radio frequency energy transmission in an imperforate composite structure  
A method and system for controlling the transmission of radio frequency energy through an imperforate multi-layer fiber and resin composite structure. Multiple segments of conductive mesh are...
5238208 Load mitigation system for a multi-dimensional transducer array  
A streamlined housing for supporting a multi-dimensional electromagnetic transducer array is attached to an aircraft fuselage via a pivot support. The streamlined housing is supported by the pivot...
5231409 Microwave antenna capable of operating at high temperature, in particular for a space-going aircraft  
A microwave antenna capable of operating at high temperature comprises at least one waveguide opening to the outside through an opening in a covering panel and including a tubular portion...
5230085 Method and apparatus for wireless electromagnetic communication within a contained electromagnetic field  
Wireless electromagnetic communication between a primary transceiver and one or more secondary transceivers located within an enclosed structure may be effectuated by forming a multi-conductor...
5225844 Rotor modulation suppressor  
The invention is a device for reducing modulation of high frequency signals induced by helicopter rotor blades made of high strength composites and having a metalized leading edge. The device uses...
5220330 Broadband conformal inclined slotline antenna array  
A missile guidance antenna that is conformal to the missile surface, dual-polarized and broadband. Slotline notch array elements (30, 52) are inclined toward boresight for both the E and H-planes....
5216435 Array antenna power supply system having power supply lines secured in a cylinder by adhesive  
A power supply system adapted for an array antenna to be mounted on satellites, airplanes, ships, land moving objects, or the like, which is so arranged that a cylindrical member (136) is provided...
5214436 Aircraft antenna with coning and banking correction  
Array antennas for aircraft use have a shiftable center of radiation. The antenna beam of a group of laterally spaced array antennas is steered and the beam shape is controlled by relative...
5206656 Array antenna with forced excitation  
Low profile array antennas for aircraft achieve improved performance with excitation circuits providing forced excitation of radiating elements to generate signals of desired relative phase and...