Satellite IoT and direct-to-device connectivity technology and investment research

Technical bottleneck

• Bottleneck type: Constellation deployment / Spectrum rights
• Technical constraint: Direct-to-device requires satellites with >100 sq meter phased-array antennas in LEO to close the link budget to a standard smartphone/ IoT modem at 0.2W transmit power; Doppler shift at 7.5 km/s LEO velocity must be pre-compensated with <1 ppb frequency accuracy; satellite NB-IoT at 500 km altitude has 30-50 ms latency vs. <10 ms for terrestrial — adequate for telemetry, not real-time control
• Economic constraint: Spectrum rights are the primary moat — AST SpaceMobile has agreements with AT&T, Vodafone, and 40+ MNOs; Starlink D2C uses T-Mobile's PCS spectrum; the satellite + terrestrial MNO partnership model locks in incumbents; constellation capex is $3-10B per system, limiting competition

Adoption

• Driver: FCC supplemental coverage from space (SCS) regulatory framework enabling direct-to-device; agriculture and maritime IoT requiring ubiquitous coverage; emergency SOS via satellite on consumer smartphones creating awareness and demand
• Blocker: Terrestrial NB-IoT and LoRaWAN coverage expanding to rural areas; satellite IoT module cost ($10-50) vs. terrestrial LPWAN ($2-5); direct-to-device satellite capacity limited (tens of Mbps per cell vs. Gbps for terrestrial); constellation deployment risk (launch cadence, funding)

Public companies exposed

ASTS (AST SpaceMobile — direct-to-smartphone broadband)

GSAT (Globalstar — Apple emergency SOS partner)

IRDM (Iridium — LEO narrowband

Certus IoT)

SATL (Satellogic — EO

not IoT)

QCOM (Qualcomm — Snapdragon Satellite

3GPP NTN modems)

STM (STMicro — satellite NB-IoT modules)

MDTKF (MediaTek — 3GPP NTN satellite IoT chips)

Validation signals

AST SpaceMobile constellation deployment and commercial service launch; 3GPP Release 17/18 NB-IoT NTN chipset availability; MNO roaming agreements for satellite direct-to-device

Invalidation signals

Terrestrial LPWAN extended range (LoRa 2.4 GHz, Amazon Sidewalk) covering rural/remote; satellite IoT module cost failing to reach <$5; AST SpaceMobile financial runway risk preventing full constellation deployment