这是雷达方程的两种基本形式，方程表明了作用距离与雷达参数以及目标特性间

These are the two basic forms of the radar equation. The equation shows the relationship between the range and the radar parameters and target characteristics. When the antenna area is unchanged, the wavelength increases and the antenna gain decreases, resulting in a decrease in the radar signal range; when the wavelength increases The antenna area required when the antenna gain is unchanged should also be increased accordingly. If the effective area is also increased, the radar's range will increase accordingly. <br>Under the condition of a certain observation environment and a certain probability of discovery and false alarm, the radar can detect the maximum distance of the target. It is mainly related to the radar performance and the cross-sectional area of ​​the target. Generally, the greater the radar transmit power, the higher the antenna gain and the receiver sensitivity, and the larger the cross-sectional area of ​​the target, the longer the detection distance. Radars have different tactical missions, different targets to be detected, and different detection ranges. <br>To explain here, the radar always detects the target in the background of interference and noise. In addition, the echo signal of the complex target is also fluctuating, so the amount of output of the receiver is also a random amount. The radar's range is a statistical value rather than a definite value. For a certain radar, it is not easy to say what its range is, but in a probability sense, under a certain false alarm probability and discovery probability, What is the range of the radar. <br>The ranging range also includes the minimum measurable distance and the maximum single-value ranging range. The so-called minimum measurable distance refers to the distance of the closest target that the radar can measure. Pulse radar transceivers share a large line. During the time of the transmitted pulse width τ, the receiver and the antenna feeder system are "disconnected", and the target echo cannot be received normally. After the transmission pulse passes, the antenna transceiver switch returns to the receiving state. It takes a while t_0. During this time. Because the echo signal cannot be received normally, it is difficult for the radar to perform ranging. Therefore, the minimum measurable distance of the radar

This is the two basic forms of the radar equation, the equation shows the relationship between the action distance and radar parameters and the target characteristics, when the line area of the day unchanged, the wavelength increases the antenna gain decreases, resulting in a decrease in the distance of action of the radar signal, when the wavelength increases, the antenna area required when the antenna gain is not changed should be increased accordingly, if the effective area is also increased, the radar effect distance will be increased accordingly.<br>Under certain observational environment and certain detection probability and false alarm probability, radar can find the maximum distance of the target. Mainly related to radar performance and target cross-sectional area, usually the larger the radar transmission power, the higher the antenna gain and receiver sensitivity, the larger the target's cross-sectional area, the farther away the detection distance. Radar tactical tasks are different, the targets to be detected are different, and the detection distances are not the same.<br>In this note, the radar is always in the background of interference and noise detection targets, in addition, the complex target's echo signal is also volatile, so the amount of receiver output is also random. The action distance of a radar is a statistical value rather than a definite value, for a radar, it can not simply say what the distance of its action, but in the probability sense, in a false alarm probability and discovery probability, the role of the radar distance.<br>The range range also includes a minimum measurable distance and a maximum single-value range. The so-called minimum measurable distance refers to the distance that the radar can measure the nearest target. Pulse radar transceiver sending and receiving common large line, in the transmission pulse width of the time, the receiver and antenna feeder system is "disconnected", can not normally put the target echo, the transmission pulse past the antenna transceiver switch back to the receiving state, also need a period of time t_0. In this period of time. Radar is difficult to measure its range because it cannot receive echo signals properly. As a result, the radar's minimum measurable distance

These are two basic forms of radar equation. The equation shows the relationship between the operating range and radar parameters and target characteristics. When the antenna area is constant, the wavelength increases and the antenna gain decreases, resulting in the decrease of radar signal operating range. When the wavelength increases, the required antenna area should also be increased when the antenna gain remains unchanged. If the effective area is also increased, the radar operating range will be increased The distance will increase accordingly.<br>Under certain observation environment and certain detection probability and false alarm probability, radar can find the maximum distance of target. It is mainly related to the radar performance and the cross-sectional area of the target. Generally, the greater the radar transmitting power, the higher the antenna gain and receiver sensitivity, and the larger the cross-sectional area of the target, the longer the detection range. Different radar tactical tasks require different targets and different detection ranges.<br>In this note, radar always detects the target in the background of interference and noise. In addition, the echo signal of complex target is also fluctuating, so the output of receiver is also random. The radar operating range is a statistical value rather than a definite value. For a certain radar, we can't simply say its operating range, but in the sense of probability, under a certain false alarm probability and detection probability, what is the radar's operating range.<br>The range also includes the minimum measurable distance and the maximum single value range. The so-called minimum measurable range refers to the distance of the nearest target that can be measured by radar. The receiving and transmitting lines of pulse radar share a large line. During the time of transmitting pulse width τ, the receiver and antenna feeder system are "disconnected", so the target echo can not be received normally. After the transmitting pulse has passed, the antenna transceiver switch returns to the receiving state, which also needs a period of time t_ 0。 In this period. Because the echo signal can not be received normally, it is difficult for radar to carry out range finding. Therefore, the minimum measurable range of radar<br>