10 results about "Effective radiated power" patented technology

The application discloses an effective radiation power regulation method based on beam control and belongs to the technical field of electromagnetic environment construction, which comprises the following steps: based on the two-dimensional antenna directional diagram test data of a phased array radiation source, scene parameters are constructed according to a complex electromagnetic environment, and the average gain of an antenna corresponding to a test area under different beam deviation angles is calculated; based on the beam pointing accuracy of the radiation source, the average gain error peak value of the antenna corresponding to different beam deviation angles is calculated, and an optimal gain-beam deviation angle corresponding table is constructed with the minimum average gain error peak value of the antenna as the target; and the beam pointing is set based on the gain-beam deviation angle corresponding table, so that the dynamic control of the effective radiation power in a specified direction is realized, and a complex electromagnetic environment with a dynamically changing amplitude is simulated equivalently in a specified area. Through the application, the dynamic control of the effective radiation power in a specified direction can be realized, and a complex electromagnetic environment with a dynamically changing amplitude can be simulated equivalently at a frequency device under test.

The invention provides a waveform modulation method and system for an electromagnetic pulse combination effect. The method comprises the following steps: acquiring remote control communication frequency and flight state information of an unmanned aerial vehicle; electromagnetic pulse parameters and radiation power of electromagnetic pulses are set; generating an interference modulation waveform by using an interference waveform generation strategy based on the electromagnetic pulse parameters; the carrier frequency of the interference modulation waveform is the same as or adjacent to the remote control communication frequency, and the pulse sequence of the interference modulation waveform has repetition pulses with repetition frequency random jitter and / or positive and negative polarity random alternation; based on the interference modulation waveform, electromagnetic pulses are transmitted to the unmanned aerial vehicle at the required effective radiation power to achieve the front and rear door combination effect. The interference modulation waveform generated by the invention has the characteristics that the frequency is the same as or adjacent to the remote control communication frequency, the repetition frequency is randomly jittered and / or the positive and negative polarities are randomly alternated, the front and back gate combination effect can be generated under relatively low transmitting power, and the operational efficiency is improved.

The invention relates to the technical field of array antennas, in particular to a 5G high-gain array antenna, one end of each fixed plate is fixedly connected with a protective cover, each protective cover is internally and fixedly connected with an antenna body, and the inner wall of each protective cover is fixedly connected with a linear motor; the output end of each linear motor is fixedly connected with a telescopic wave-absorbing nail array piece through a connecting shaft, each telescopic wave-absorbing nail array piece is located on the outer side of the corresponding antenna body, and each protective cover is connected with a plurality of heat dissipation fins at equal intervals in the axis direction. After the linear motor is started, the telescopic wave-absorbing nail array piece is driven to move through the connecting shaft, after the telescopic wave-absorbing nail array piece moves, an effective dielectric constant in the protective cover is changed, resonance conditions are damaged, standing wave distribution is disturbed, and a resonant cavity effect cannot be formed in the protective cover, so that reduction of effective radiation power cannot be caused; therefore, the signal transmission quality is improved.

The application discloses a high-power microwave antenna establishing method, and belongs to the technical field of antennas. The method comprises the following steps: determining the total radiation aperture of the antenna according to the size and gain requirement of the microwave antenna of a system, and estimating the aperture and quantity of the required transmitting antenna by considering the beam synthesis efficiency; and selecting a proper rotating table according to the aperture and quantity of the transmitting antenna. Since the antennas are installed on the same rotating table, the consistency between the antennas can be ensured through a tooling, so that all the antennas can be simultaneously aimed at a target or a certain direction by rotating the rotating table, the signal transmitting distances of the antennas to the target are the same, and the effective radiation power in a certain direction can be maximized by only ensuring that the amplitude, phase and time delay of the front-end link of the transmitting antenna are the same. Since the antennas are on the same rotating table, the driving systems of the antennas are the same, and the influence of the time delay between different driving systems is eliminated.

The invention provides an unmanned aerial vehicle microwave pod based on a high-power microwave pulse compression technology aiming at the countering requirement of an unmanned aerial vehicle and a fleet and the problems that a traditional hard killing weapon is low in response speed, high in cost-effectiveness ratio and the like. Comprising a horizontal polarization X-band horn antenna, an X-band pulse compression assembly, an unmanned aerial vehicle passive detection system forming killing effective radiation power not less than 1GW, a rotary table, a high-voltage power supply assembly, a lithium ion battery pack, a high-voltage / low-voltage connection cable assembly, a communication radio station / data transmission terminal and a transmitting antenna servo and structural member. The system has the advantages that the system can defend the unmanned aerial vehicle, and potential threats are reduced. The cost is low, and effective operation can still be ensured in severe weather.

This invention provides a waveform modulation method and system for electromagnetic pulse combination effects. The method involves acquiring the remote control communication frequency and flight status information of a UAV; setting electromagnetic pulse parameters and radiated power; generating an interference modulation waveform based on the electromagnetic pulse parameters using an interference waveform generation strategy; the carrier frequency of the interference modulation waveform being the same as or adjacent to the remote control communication frequency, and the pulse sequence of the interference modulation waveform having repetitive pulses including random jitter of repetition frequency and / or random alternation of positive and negative polarities; and transmitting electromagnetic pulses to the UAV with the required effective radiated power based on the interference modulation waveform to achieve a front-and-back door combination effect. The interference modulation waveform generated by this invention has the characteristics of being the same as or adjacent to the remote control communication frequency, and having repetitive pulses with random jitter of repetition frequency and / or random alternation of positive and negative polarities, which can generate a front-and-back door combination effect with relatively low transmission power, improving operational effectiveness.

The present invention discloses a terahertz radiation source based on a package with an air cavity dielectric lens, and relates to the field of terahertz radio frequency technology. The radiation source comprises: a dielectric lens with an air cavity, a terahertz radiation source chip, an FR4 circuit board, and a bonding gold wire. The terahertz radiation source chip is connected to the FR4 circuit board via a bonding gold wire, and the FR4 circuit board provides the terahertz radiation source chip with an operating voltage and a DC filter circuit. The core component of the terahertz radiation source adopts a resonant tunneling diode, which utilizes the negative resistance characteristics of the resonant tunneling diode and the equivalent inductance of the radiating antenna to form an LC oscillation to generate a terahertz radiation signal, which is radiated into free space through the dielectric lens with an air cavity. The present invention adopts a dielectric lens with an air cavity to package the terahertz radiation source, thereby improving the effective radiation power of the terahertz radiation source, having the advantages of high directivity and easy integration, and having important application value in long-distance terahertz communication and high-precision terahertz detection.

The invention relates to the technical field of wireless communication, and discloses a broadband FPC antenna. The broadband FPC antenna comprises a copper foil layer. A black oil layer; an AD adhesive layer; a PI base layer; a 3M adhesive layer; a release paper layer; the radiation unit part is arranged on the copper foil layer and comprises first to fourth radiation parts; radiation intervals including first to fourth radiation intervals; the positioning part is arranged between the first radiation part and the second radiation part and between the third radiation part and the fourth radiation part; and a feeding point to which the radiation unit part is connected. The radiation unit part forms a multi-band synergistic radiation structure, the design of the multi-radiation part of the FPC antenna covers a wider frequency range, and impedance mismatch caused by frequency deviation of a single radiation unit is avoided, so that the energy transmission loss is reduced, the effective radiation power is improved, the communication distance is effectively increased, and the bit error rate is reduced. The positioning part limits the relative displacement of the radiation part, thereby preventing antenna impedance change or radiation direction offset from causing antenna performance reduction. The invention further discloses an acquisition and transmission all-in-one machine.

The application provides a multi-octave phased array design method based on a heterogeneous antenna combination, which comprises the following steps: step 1, constructing a high-frequency array; step 2, constructing a medium-frequency array; step 3, constructing a low-frequency array; step 4, constructing a multi-stage subarray synthesis switch network, or configuring an AD / DA module after each array element channel in a full-channel digital array manner, so that the sampled data after discretization is digitally beam synthesized according to the equivalent array element relationship; and step 5, configuring corresponding working frequency band components according to the antenna type, and configuring AD / DA modules according to the subarray output of each frequency band. The method improves the gain utilization rate of the system in the multi-octave working frequency band, reduces the number of hardware channels without reducing the effective radiation power and sensitivity, compresses the equipment cost, meets the balance between the array gain and the number of channels of the system, and changes the characteristic that the efficiency of a single antenna at low frequency is always lower than that at high frequency.

The application relates to the technical field of array antennas, in particular to a 5G high-gain array antenna, one end of each fixed plate is fixedly connected with a protective cover, each protective cover is fixedly connected with an antenna body, the inner wall of each protective cover is fixedly connected with a linear motor, the output end of each linear motor is fixedly connected with a telescopic wave-absorbing peg array piece through a connecting shaft, each telescopic wave-absorbing peg array piece is located on the outer side of the corresponding antenna body, and a plurality of heat dissipation scales are connected on each protective cover along the axial line direction at equal intervals. After the linear motor is started, the telescopic wave-absorbing peg array piece is driven to move through the connecting shaft, the equivalent dielectric constant in the protective cover is changed after the telescopic wave-absorbing peg array piece moves, the resonance condition is destroyed, the standing wave distribution is disturbed, the resonance cavity effect cannot be formed in the protective cover, the effective radiation power cannot be reduced, the covering radius cannot be reduced, and the signal transmission quality is improved.