AN11068: BGU8007/BGU7005 Matching Options for Improved LTE Jammer Immunity
This application note details matching topologies for BGU8007 and BGU7005 LNAs to enhance immunity against 700 MHz LTE band jammers in GNSS receiver applications.
Overview
This document describes several input matching topologies for the NXP BGU8007 and BGU7005 Low Noise Amplifiers (LNAs) specifically designed for Global Navigation Satellite System (GNSS) receivers, including GPS, GLONASS, and Galileo. It contrasts a baseline single-element matching circuit with a modified three-element topology that creates a gain null in the 700 MHz LTE band. This approach improves jammer immunity by reducing second-order spurious products and harmonics that can interfere with GNSS signals. The document provides technical performance data, including gain, noise figure, return loss, and two-tone test results using Murata LQW15 series inductors and other passive components.
Use Cases
- GNSS receiver front-end design
- Improving RF jammer immunity in mobile devices
- GPS/GLONASS/Galileo signal amplification
- Optimizing LNA linearity for LTE coexistence
- Satellite navigation receiver circuit design
Topics
Referenced Parts
Murata
Both the standard BGU8007 and BGU7005 evaluation boards are supplied with a Murata LQW15 series inductor (0402 size) in the input match.
BGU7005
NXP Semiconductors
The BGU8007 and BGU7005 are low-noise amplifiers dedicated for Global Navigation Satellite System (GNSS) receiver applications.
BGU8007
NXP Semiconductors
The BGU8007 and BGU7005 are low-noise amplifiers dedicated for Global Navigation Satellite System (GNSS) receiver applications.
BGU7007
NXP Semiconductors
2-Tone Test BGU7005 and BGU7007 GPS LNA (UM10453)
1.8pF
Murata
C1 Input Matching 1.8pF Murata GJM15
2.0pF
Murata
C1 Input Matching 2.0pF Murata GJM15
2.4pF
Murata
C1 Input Matching 2.4pF Murata GJM15
5.1nH
Murata
L1 Input Matching 5.1nH Murata LQW15
5.6nH
Murata
L1 Input Matching 5.6nH Murata LQW15
6.2nH
Murata
L1 Input Matching 6.2nH Murata LQW15
6.8pF
Murata
C2 Input Matching 6.8pF Murata GRM15
| GJM15 | Murata | Component C1 Input Matching Value 1.8pF Supplier Murata GJM15 |
| GRM15 | Murata | Component C2 Input Matching Value 6.8pF Supplier Murata GRM15 |
| LQW15 | Murata | Both the standard BGU8007 and BGU7005 evaluation boards are supplied with a Murata LQW15 series inductor (0402 size) in the input match. |
| GJM15 | Murata | C1 Input Matching 1.8pF Murata GJM15 |
| GJM15 | Murata | C1 Input Matching 2.4pF Murata GJM15 |
| GJM15 | Murata | C1 Input Matching 2.0pF Murata GJM15 |
| GRM15 | Murata | C2 Input Matching 6.8pF Murata GRM15 |
| LQW15 | Murata | L1 Input Matching 5.1nH Murata LQW15 |
| LQW15 | Murata | L1 Input Matching 5.6nH Murata LQW15 |
| LQW15 | Murata | L1 Input Matching 6.2nH Murata LQW15 |
| BGU7005 | NXP Semiconductors | The BGU8007 and BGU7005 are low-noise amplifiers dedicated for Global Navigation Satellite System (GNSS) receiver applications. |
| BGU8007 | NXP Semiconductors | The BGU8007 and BGU7005 are low-noise amplifiers dedicated for Global Navigation Satellite System (GNSS) receiver applications. |
| BGU7007 | NXP Semiconductors | 2-Tone Test BGU7005 and BGU7007 GPS LNA (UM10453) |
| 1.8pF | Murata | C1 Input Matching 1.8pF Murata GJM15 |
| 2.0pF | Murata | C1 Input Matching 2.0pF Murata GJM15 |
| 2.4pF | Murata | C1 Input Matching 2.4pF Murata GJM15 |
| 5.1nH | Murata | L1 Input Matching 5.1nH Murata LQW15 |
| 5.6nH | Murata | L1 Input Matching 5.6nH Murata LQW15 |
| 6.2nH | Murata | L1 Input Matching 6.2nH Murata LQW15 |
| 6.8pF | Murata | C2 Input Matching 6.8pF Murata GRM15 |