Multi-patch and lumped elements will make antennas complicated, whereas to add slots is a simple way to operate in dual-band in single layer patch, and it is very easy to integrate with microwave circuits.

• 多贴片和集总加载都会使天线的结构变得复杂,而槽加载作为一种简单的加载方式,可以在单层微带天线上实现双频,制作生产相对简单,且容易与微波电路集成,常见的槽有U型槽,L型槽等。