Case study: Cowin antenna’s 4G waterproof rod antenna works with photovoltaic companies to change the environment, making the sky bluer and the water clearer.
Customer background:
The world's top 500 holding company is a diversified high-tech and manufacturing enterprise of inverter and energy storage system manufacturers.
Antenna performance requirement:
The antenna has the function of waterproof and UV protection, and can meet the signal reception of the three major operators at the same time.
The challenge:
The unstable factors of the operator's signal in remote areas will cause signal interruption, which will test the performance of the antenna. At the same time, the harsh environment of photovoltaics also brings some unique challenges, such as high and low temperature fluctuations and vibrations, so it is necessary to develop correct A solution means breaking through technical and physical boundaries.
Solution:
1.698-960/1710-2700MHz full-band coverage, larger-sized antennas can provide larger bandwidth and higher efficiency, affected by the size of the established equipment, compress and tune the range according to the required antenna size, generally need A wide range of capacity changes to achieve frequency migration, so multiple tuning elements and/or a wide range of tuning values are usually required. For this, engineers increase the resonance point of the antenna line and re-match the equipment circuit.
2. Influenced by size, engineers select high-quality copper rods and double-sided circuit boards to debug the resonant frequency, and the dark room test reaches up to 3DB gain and 60% efficiency.
3. A 2MM thick waterproof silicone gasket is added to the connection between the antenna and the device to double ensure that the internal structure of the device and the antenna is not affected by rainy weather.
4. UV agent is added to the molding of the plastic shell, and there is no abnormal deformation and cracking after the high and low temperature cycle test of - 40 ˚C ~ + 80 ˚C for 80 hours.
5. The overall size of the final antenna combination is 90*10MM long, and it has passed the customer's actual test and acceptance.
Economic benefits:
The customer has successfully launched the product to the market and achieved sales of 300,000 units.
