Wireless Modules And Antenna Design Guidelines; Introduction; Wlan System Integration Considerations; Antenna Integration Into The Platform - Intel Quark SoC X1000 Design Manual

Wireless Modules and Antenna Design Guidelines—Intel
22.0

Wireless Modules and Antenna Design Guidelines

22.1

Introduction

There are a broad range of Wireless modules available suited to different regulatory,
performance and user requirements. This chapter shall discuss choice of antenna
materials, placement options and coexistence considerations for Intel
X1000-based designs.
Co-existence of multiple wireless modules and their antennas, among themselves and
with the other systems and parts in the device can become a major problem if not
considered in the initial stages of design.
SoC may support radios for:
• WiFi
• Bluetooth* (BT)
• ZigBee (802.15.4)
22.2

WLAN System Integration Considerations

22.2.1

Antenna Integration into the Platform

The goal of successful antenna integration on the system is four-fold:
1. Maintain good antenna efficiency for all antennas taken separately
2. Ensure that platform noise coupling into each antenna is minimized (in-band
noise).
3. Isolation between antennas is adequate to allow for:
a. Typical simultaneous radio usage scenarios to be supported (co-existence)
b. For radios supporting MIMO (multiple input and multiple output) or diversity, the
spatial correlation and mutual coupling are low enough that maximum benefit
can be derived from the additional radio chain
The following must be considered when deciding placement of antennas:
Antenna size – Larger sizes tend to provide better performance (gain, bandwidth,
efficiency).
Separation of radiation element from lossy structures including LCD
enclosure: Larger separation will provide higher bandwidth. In general, lower
operational frequencies require larger separation compared to higher operational
frequencies. Also, larger bandwidth considerations require larger separation from
nearby metallic structures.
Isolation between antenna ports: Larger spatial separation is one way of increasing
the isolation between ports of radio modules that operate in bands that are close to one
another.
June 2014
Order Number: 330258-002US
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Quark™ SoC X1000
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Quark™ SoC
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Intel Quark™ SoC X1000
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