**5. Ultra-wideband compact integrated modules**

UWB integrated modules of 18 to 40GHz Direction Finding system are shown in **Figures 12** and **13**. A photo of a compact UWB frontend is shown in **Figure 12**. The frontend module consists of a limiter and a wideband 18 to 40GHz LNA. The low noise amplifier LMA406 is A Filtronic MMIC LNA. The LNA gain is around 11 ± 1 dB with 4 ± 0.5 dB noise figure and 13 ± 1 dBm saturated output power. The LNA dimensions are 1.45 × 1.1 × 0.1 mm. A wide band PHEMT MMIC SPDT is used,

**Figure 12.** *18 to 40GHz frontend module.*

**21**

**Author details**

Senior Researcher, Lecturer and Electromagnetic Consultant, Ort Braude College,

© 2021 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

\*Address all correspondence to: sabban@netvision.net.il

provided the original work is properly cited.

Albert Sabban

Karmiel, Israel

*Introductory Chapter: Ultra-Wideband Technologies DOI: http://dx.doi.org/10.5772/intechopen.97675*

low frequencies the losses are around 10.5 dB.

AMMC-2008. The SPDT losses are lower than 2 dB. The isolation between the SPDT input port to the output ports is lower than -25 dB. The SPDT dimensions are 1 × 0.7 × 0.1 mm. The frontend electrical characteristics was evaluated by using ADS software. **Figure 13** presents a photo of the compact Switched Filter Bank SFB unit. The SFB Module consists of three side coupled microstrip filters. Each filter consists of nine sections. The filters are printed on a 5mil alumina substrate. A one to two dB attenuators connect the filters input and output ports to wide band MMIC switches. The attenuators are used to adjust each channel losses to the average required level. The module losses are adjusted to be higher in the low frequencies and lower in the high frequencies. AWR and ADS software were used to optimize the filter dimensions and structure. The SFB losses at high frequencies are around 9 dB and at the

**Figure 13.** *A photo of UWB switched filter Bank.*

### *Introductory Chapter: Ultra-Wideband Technologies DOI: http://dx.doi.org/10.5772/intechopen.97675*

AMMC-2008. The SPDT losses are lower than 2 dB. The isolation between the SPDT input port to the output ports is lower than -25 dB. The SPDT dimensions are 1 × 0.7 × 0.1 mm. The frontend electrical characteristics was evaluated by using ADS software.

**Figure 13** presents a photo of the compact Switched Filter Bank SFB unit. The SFB Module consists of three side coupled microstrip filters. Each filter consists of nine sections. The filters are printed on a 5mil alumina substrate. A one to two dB attenuators connect the filters input and output ports to wide band MMIC switches. The attenuators are used to adjust each channel losses to the average required level. The module losses are adjusted to be higher in the low frequencies and lower in the high frequencies. AWR and ADS software were used to optimize the filter dimensions and structure. The SFB losses at high frequencies are around 9 dB and at the low frequencies the losses are around 10.5 dB.
