-048 can be used for radio direction finding at frequencies from 1GHz-8.5GHz with no requirements. When held in one hand, it has considerable sensitivity to the direction of the signal source and changes direction with the body. The -048 antenna is a printed LDPA and now it can be easily used with the for ULTRA. Using new technology, we are now to match an ultra-wide range of 400MHz-8GHz. The antenna has a nominal input resistance of 50, and the return loss fluctuates when the antenna is connected to a 50 source. In most frequency bands above 1GHz, the return loss is about 10dB or less, and the VSWR is about 2. In the 400M-1GHz band, the return loss is about 4.5dB or less, and the VSWR is about 4. The VSWR increases at frequencies below 400MHz. Item No.:-048 Type:Handheld Spectrum Analyzer The product appearance and printed words depending on the batch, but this does not affect use Colour:As Shown Material:Metal Package Contents: 1 x -048 Antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.