7 results about "Radio wave" patented technology

An antenna unit includes an antenna module that receives radio waves sent from a satellite or earth, a cover member that has enough inner space to house the antenna module and has an opened bottom surface, and a bottom plate that closes the opened bottom surface of the cover member, and the antenna unit is attached to a resin-made attachment part. A metal sheet is provided on a back surface side of the resin-made attachment part, and the antenna unit is adhesive bonded and fixed on a surface side of the resin-made attachment part correspondingly to an arrangement position of the metal sheet.

The invention relates to an unmanned corn harvester, and belongs to the technical field of unmanned aerial vehicle application. An unmanned aerial vehicle flies in low altitude over the unmanned corn harvester which performs corn harvesting operation, the lower face of the front portion of the unmanned aerial vehicle is provided with an electro-optical pod, a high-pixel digital camera installed in the electro-optical pod performs full-automatic photography work by aiming at the corn harvester which harvests corn and surrounding corn field, an image sensor of the digital camera inputs acquired aerial image information of grain field into a first electronic computer to be stored and imaged, and a digital image is input into a flight control computer to guide flying of the unmanned aerial vehicle. The aerial image information of the grain field is input into a second electronic computer through a first wireless communication device in the unmanned aerial vehicle, radio waves and a second wireless communication device in the unmanned corn harvester to be stored and calculated, and a calculated result is input into an unmanned self-control driving device to control a corn harvesting table arranged on the front portion of the unmanned corn harvester to perform operation of harvesting the corn.

The invention discloses a method for electromagnetic simulation of different error maps with a ray tracing algorithm, which mainly solves the problem of the undefined influence degree of different types of map error factors in geometric environmental information on an existing ray tracing model predicting result. The method is implemented by the following steps: (1) obtaining a required digital map corresponding to the outdoor micro-area environment; (2) respectively generating a plurality of building top offset error maps and wall translation error maps on the basis of the obtained map; (3) performing radio wave propagation simulation prediction on the original digital map and the error maps by adopting a ray tracing model, so as to obtain a mean value and a root-mean-square value of path losses of the top offset error maps and the wall translation error maps as well as the original digital map at each test point. According to the method, the influence degree of the different types of error factors in the geometric information on the precision of the ray tracing predicting result can be analyzed through the mean value and the root-mean-square value which are obtained through simulation, and reference is provided for radio wave propagation and channel prediction in an outdoor micro-area scene.

The invention relates to the technical field of unmanned aerial vehicles, in particular to a light-load long-distance cruising unmanned aerial vehicle group system. The system comprises a ground control base station and at least one unmanned aerial vehicle group. The at least one unmanned aerial vehicle group comprises at least one main control unmanned aerial vehicle and N controlled unmanned aerial vehicles. AAT full-automatic tracking holders and wireless network bridges are carried on the ground control base station and the main control unmanned aerial vehicle. The AAT full-automatic tracking holders and the wireless network bridges are used for point-to-point transmission of control instructions between the ground control base station and the main control unmanned aerial vehicle. A router is carried on the main control unmanned aerial vehicle, wifi modules are carried on the N controlled unmanned aerial vehicles, and signal communication and instruction transmission are carried out between the main control unmanned aerial vehicle and the controlled unmanned aerial vehicles through wifi signals. According to the technology, the whole unmanned aerial vehicle group can fly farther and is higher in cruising ability, the adopted radio wave signals enable the unmanned aerial vehicle group to have the functions of investigation prevention and better concealment, and the unmannedaerial vehicle group can execute tasks in mountainous areas and seismic zones without 4G, 5G or other signals.

A non-contact IC apparatus is provided in a simple configuration with a plurality of IC chips, while enabling reliable communication. A non-contact IC apparatus 1 has a plurality of IC chips 30, 50, an antenna 11 for receiving a radio wave for non-contact IC apparatus, a modem part 12 for acquiring a signal from the radio wave received by the antenna 11, and a distribution control part 13 for selecting an IC chip to receive the signal, out of the plurality of IC chips 30, 50, based on the signal acquired by the modem part 12, and for transmitting the signal to the selected IC chip.