Portable wireless device threat assessment for aircraft navigation radios

Abstract

This paper addresses the concern for Wireless Local Area Network devices and two-way radios to cause electromagnetic interferenee to aircraft navigation radio systems. Spurious radiated emissions from various lEEE 802.11a, 802.11h, and Bluetooth devices are characterized using reverberation chambers. The results are compared with baseline emissions from standard laptop computer and personal digital assistants (PDAs) that are currently allowed for use ou aircraft The results indicate that the WLAN devices tested are not more of a threat to aircrafl navigation radios than staudard laptop computers and PDAs in most aircrafl hands. In addition, spurious radiated emission data from seven pairs of two-way radios are provided. These twoway radios emit at much higher levels in the bands considered. .A description of the measurement process, device modes of operation and the measurement results are reported.

Radio frequency compatibility of an RFID tag on glideslope navigation receivers

“…In addition, Table 5.6-1 provides the minimum passenger cabin IPL data for several large aircraft models [4] [9]. Since the data came from different sources, inconsistencies with respect to transmit antenna gain normalization should be expected, but should not be greater than about 5 dB.…”

Small Aircraft RF Interference Path Loss

“…There have been many past studies addressing the three elements. Examples include emissions measurements from wireless devices in aircraft radio bands [1] [2]. Aircraft radio receiver interference thresholds data may be found in [3][4] [5].…”

Wireless phone threat assessment for aircraft communication and navigation radios

“…The measured results were compared against the emissions from common computer laptops and PDAs previously reported in [2]. The PDAs/laptop computers emission data establish a baseline for devices that are currently allowed on an aircraft.…”

“…Ref. [2] provides additional details on the limits and the equivalent power levels. Table IV and Fig.…”

“…Built upon the process and results from the previous efforts [1] [2], this study revisits the phone emissions topic. The current effort focuses on the latest generation of phones that are more data-capable.…”