Although the existing technologies have been used in actual anti-UAV operations and play their own advantages, the disadvantages and limitations of different types of anti-UAV systems are also prominent. The monitoring and control system can achieve countermeasures to the UAV through signal interference, but due to the frequent update of the uav technology, the system cannot achieve full coverage. For example, for small low-flying drones, radar systems may not recognize them; camera systems may not distinguish drones from birds or aircraft.

The destruction and capture system has good strike effect, a wide range of applicable environment, but often the supporting equipment is more complex and expensive, and it is easy to cause secondary safety hazards. In a 2017 anti-drone exercise in the US, where defense companies tested their anti-drone products on a drone about 200m away, the organizers reported that the drone was generally "very damage resistant" and concluded that most CUAV systems need further development. Communication interference system has low operating cost, but due to the rapid development of communication technology, it is difficult to reach a large coverage, and it is extremely vulnerable to the interference of surrounding electromagnetic signals in the densely populated areas. Many signal distractors operate only a few hundred meters, less effective for remote drones; high-power devices can operate remotely and beyond sight, but increase the risk of interfering with normal communication. To sum up, all kinds of countermeasures systems have their advantages and disadvantages, and can not effectively suppress the UAV system.

Combined with the recent research and practice of various countries, the development trend of anti-UAV system is mainly analyzed from the following aspects.1) focus on small uav, improve system coverage ability with the progress of science and technology and the evolution of military demand, small drones by carrying radar, relay station equipment, further expand the mission scope, improve the threat, the worlds major military powers through transformation, upgrade, enhance the ability of the small uav. For example, in the summer of 2019, when the Saudi oil facility was hit to small low-altitude attacks by the Houthis or Iran, its well-equipped systems did not provide effective defense; Russia upgraded the Armor S1 air defense system to intercept 500 m/s faster drones.2) Strengthen laser weapons and improve the ability to deal with the UAV group. The emergence of UAV group poses new technical challenges to the capability of the anti-UAV system. For example, the radio beam launched by directional jammers is narrow, which cannot be effectively disturbed o the relatively scattered UAV group; most of the equipment does not have the ability to track more than several UAVs at the same time. At present, laser weapons perform better in attacking drone groups due to their higher accuracy, faster speed and better safety,Can accurately eliminate the threat of targets missed by conventional weapons. Compared with large aircraft, the cost of drone groups is relatively low, and this low-cost but efficient strike approach is the future trend for the upgrading of existing weapon systems.3) research and development of portable or integrated system, improve the ability of rapid strike whether heavy load of large drones, or only a few hundreds of low micro reconnaissance aircraft, have high flexibility, the characteristic determines the drone system must have rapid response ability, system from the boot to the timeliness of the uav

Due to light weight and low operating environment requirements, portable equipment can be deployed and traveling quickly. The integrated anti-UAV system can complete the detection, tracking, identification and strike of UAV, with a wide coverage, good mobility and high safety, and will be studied as a key direction by various countries.