The winning products were Comba Telecom's CriticalPointPublic Safety Bidirectional Antenna
, DragonWave's Harmony Enhanced MC, GEAR4's D3O Piccadilly Case, Jabra's Elite Sport Wireless Earbuds, Leef's iBridge 3, Sabre Industries' SmartStack small cell pole, and weBoost's Drive 4G-X signal booster.
The typical bidirectional antenna was accomplished by installing two unidirectional antennas in the opposite directions , but the directivity was not high, and the design was complicated.
Section 3 shows the proposed stacked bidirectional antenna structure based on the bidirectional Yagi antenna.
For comparing the performance of the traditional Yagi-Uda and the proposed bidirectional antenna, we build an optimum Yagi-Uda antenna with four directors and a bidirectional Yagi antenna with eight directors.
As shown in Figure 3(a), the bidirectional antenna has a frequency offset around 30 MHz (3.
Based on the bidirectional Yagi antenna mentioned in the last section, we propose a stacked bidirectional antenna in this section.
The proposed bidirectional antenna combines the coupling feed driver and stacked director array, as shown in Figure 5.
The performance of the proposed bidirectional antenna is also compared with some previous directional antennas, as shown in Table 1.
A compact stacked bidirectional antenna has been presented for dual-polarized 2.