DJI Agras T20 OEM SDR Antenna

The DJI Agras T20 OEM SDR Antenna is one of the aircraft-side antennas of the T20's SDR (software-defined radio) link — the radio connection between the aircraft and its remote controller that carries control and telemetry. It is a black antenna element on a long, thin, copper-coloured coaxial lead that ends in a small gold-coloured connector, and it belongs to the communication system, not to the spray, propulsion or power systems. It is identified for the DJI Agras T20 and T16. Operators usually come looking for it when the link starts to weaken or drop, when an antenna lead has been pinched or torn during shell or arm work, or when a crash has broken an antenna element, and they search for it as a T20 SDR antenna, a T16 antenna replacement, a T20 signal antenna, or a T20 image transmission antenna. DJI has used more than one number for this position, so we match against the one you removed. The T40 uses a different part, the DJI Agras T40 OEM SDR External Antenna.

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🇺🇸 U.S.A. FIRST

Ares Acres LLC is a U.S.-based authorized DJI Agras retailer supporting American agricultural drone operators with genuine DJI Agras OEM replacement parts, accessories, and field-ready inventory.

FREE & FAST Shipping is included for all U.S. customers.

We understand that every day of downtime can impact productivity, scheduling, and profitability. That's why we focus on providing fast fulfillment, responsive customer support, and reliable access to the parts operators need most.

Ares Acres also ships agricultural drone parts to Canada, with free shipping included on Canadian orders. Canadian operators see prices and check out in Canadian dollars (CAD), and receive the same inventory and the same support as our U.S. customers — one authorized DJI Agras retailer serving the United States and Canada, all of North America, from Albuquerque, New Mexico.

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✅ DJI Agras T20 / DJI Agras T16 Compatibility Guarantee

• 🇺🇸 USA Compatibility Guarantee
• 👍🏻 Satisfaction Guarantee
• 💵 Money Back Guarantee
• 📦 Same Day Shipping & Tracking
• Identified for the DJI Agras T20 and T16, SDR antenna position
• Matched by antenna element, lead routing and connector against the antenna you removed
• Genuine DJI OEM communication component, brand new

Antennas on these aircraft are not all alike, and the T40's SDR antenna is a separate part. If you want the match confirmed, photograph the antenna you removed with its full lead laid out straight and its connector in focus, and send it to us — we will match it for you.

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📦 Package Includes

• 1 × SDR antenna — antenna element with its coaxial lead and connector attached

This is one antenna. The element, the lead and the connector come as one piece; they are not separate parts. If more than one antenna on your aircraft needs replacing, each one is a separate unit.

Not included: the radio module or board the connector plugs into, cable ties, clips, adhesive pads, the shell or landing-gear parts the antenna is mounted in, and the remote controller's antennas. Reuse the original clips and ties only if they still grip without cutting into the lead.

Nothing is included because it appears near the antenna on the aircraft. If a clip or retainer broke when the old antenna came out, tell us which one and we will help you identify it.

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🔧 Component Overview

The SDR antenna is the aircraft end of the radio link. The aircraft's radio sends and receives through it; the remote controller does the same through its own antennas. Between them they carry the commands you give and the telemetry and view you get back.

Each antenna has three working parts:

• The antenna element — the black stick at the far end, which is the part that actually radiates and receives
• The coaxial lead — a long, thin, copper-coloured cable that carries the signal between the element and the radio without picking up noise along the way
• The connector — a small gold-coloured coaxial connector at the other end, which plugs into the radio

The antenna is placed away from the radio so that the element sits where it has a clear view out of the airframe; the lead is what bridges the distance. That routing is the antenna's weak point. A thin coaxial lead passing through shells, past fold joints and under covers is easy to pinch, kink or chafe, and the damage is usually hidden where the lead runs.

Over a working season the antenna sees:

• Shell and cover removal for battery, board and cable work, with the lead in the way
• Hard landings and tip-overs that strike the element or strain the lead
• Vibration through the frame on every flight
• Spray residue and wash water around the element and the connector
• Heat and sun on the trailer between flights
• Connectors unplugged and replugged during other repairs

Antennas come out for three reasons: a broken or cracked element after an impact, a lead that has been pinched, kinked, chafed or torn, or a connector that no longer seats firmly. The first is visible. The other two are found by tracing the lead, and by reading the link the right way.

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⚙️ Functional Purpose

The antenna's engineering role is to couple the aircraft's radio to the air: to radiate the outgoing signal and collect the incoming one with as little loss as possible between the element and the radio.

In the communication system it:

• Carries the aircraft side of the control link with the remote controller
• Carries telemetry and the view returned to the remote controller
• Places the radiating element away from the radio, where it has a clearer path out of the airframe
• Shares the work with the aircraft's other antennas, so the link holds as the aircraft turns

What it does not do matters as much:

• It does not decide link quality on its own; the radio, the remote controller and the surroundings all play a part
• It is not the RTK antenna, which receives positioning signals, not the control link
• It does not power anything and carries only radio signal
• It does not fix a radio module fault or a remote controller fault
• It is not the remote controller's antenna

The aircraft does not rely on a single antenna. That shared work is what makes the diagnosis possible: when one antenna fails, the link does not simply die, it gets worse in some directions and stays fine in others.

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🔍 Diagnosis — a link that fades with the aircraft's heading is one antenna, not the radio

A weak link is usually blamed on the radio, the remote controller, the firmware or the field. Sometimes it is one of those. Very often it is one antenna, and the way the link fails says which.

Because the aircraft shares its link across more than one antenna, losing one does not cut the link. It thins it. The aircraft still flies, still responds, still sends back a view — until it turns a particular side away from the remote controller. Then the healthy antennas are partly shielded by the airframe and the damaged one cannot take over. The link drops, the aircraft turns again, and the link comes back.

That pattern is the signature:

• Signal strength that drops on one leg of a spray pass and recovers on the return leg
• A weak or broken link at the same heading on different days and in different fields
• Normal link quality close in, and drop-outs at distances that used to be fine
• A link that changed after shell, arm or landing-gear work, or after a crash
• One side of the aircraft showing scuffing, a broken element or a pinched lead

A radio, remote controller or environment fault looks different. It is weak in every direction at once, or it changes with location and interference rather than heading. Rule those out first:

• The remote controller's antennas — check they are fitted, undamaged and oriented as DJI shows
• Interference and obstructions — compare the link in a different field before condemning hardware
• A connector not fully seated — reseat the antenna connector at the radio; one that has worked loose behaves like a failed antenna
• A radio module fault — if every direction is weak, the antennas are not the first suspect

Then trace the lead. With the shells off, follow each SDR antenna lead from element to connector. Look for flattened or kinked sections, chafed sheath where it passes an edge or a fold joint, a lead trapped under a screw or panel, and a connector that sits crooked. Compare the leads with each other: a damaged one usually looks different from its neighbours.

Do those checks first, while the shells are already off and that information is still cheap. If an element is cracked, a lead is crushed, kinked or cut, or a connector no longer holds, replace that antenna.

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⚠️ Common Replacement Indicators

Replace an SDR antenna when inspection confirms one of these:

• A cracked, broken or missing antenna element
• A coaxial lead that is flattened, sharply kinked, cut or chafed through its sheath
• A lead that has been trapped under a screw, a panel edge or a fold joint
• A connector that is bent, corroded, or no longer seats firmly in the radio
• A link that weakens at one aircraft heading and recovers at others, with the remote controller and environment ruled out
• A link that changed immediately after an impact on one side, or after shell or arm work

Inspect these first, because they produce similar symptoms:

• The remote controller's antennas and their orientation
• The antenna connector's seating at the radio
• Local interference and obstructions in the field
• The other SDR antennas on the aircraft
• The radio module, if the link is weak in every direction

There is no published service interval for this antenna. It is replaced when it is damaged, not on a schedule.

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📐 Specifications

Product name: DJI Agras T20 OEM SDR Antenna

DJI family: Agras

Primary aircraft: DJI Agras T20

Also listed for: DJI Agras T16

Fitment basis: Identified for the DJI Agras T20 and T16

Aircraft system: Communication — SDR radio link

Component type: Antenna with integrated coaxial lead and connector

Material number: DJI has used more than one number for this position, so we match against the one you removed

Quantity: 1 antenna

Form: Black antenna element on a long, thin coaxial lead ending in a small connector

Lead: Thin coaxial cable, copper-coloured

Connector: Small gold-coloured coaxial connector; connector type not published for this part

Material: Not published for this part

Colour: Black element, copper-coloured lead, gold-coloured connector

Lead length: Not published for this part

Dimensions: Not published for this part

Weight: Not published for this part

Electrical: Radio-frequency signal only; frequency bands not published for this part

Mounting position: Not published for this part; match the position against the antenna you removed

Installation method: Connector plugs into the radio; lead routed and clipped through the airframe to the element position

Hardware included: None — clips, ties and adhesive pads are not supplied

Service adjustability: None — the antenna is undamaged and correctly routed or it is not, with no adjustment or app setting that compensates

Condition: Brand new

Classification: DJI OEM communication component

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🛠️ Installation & Maintenance

Before installation

• Power the aircraft down and remove the battery
• Rinse and dry the area so you are not working in spray residue
• Photograph the antenna in place: the element position, the whole lead route, every clip and tie, and the connector at the radio
• Lay the new antenna beside the old one and compare the element, the lead and the connector
• Note which antenna you are replacing, so its lead goes back on the same route

During installation

• Remove the shells or covers along the lead route in the order they came on
• Unplug the connector straight out of the radio without levering against the board
• Release the clips and ties and draw the old lead out without pulling it against edges
• Route the new lead exactly as your photographs show, clear of fold joints, screw holes and panel edges
• Do not bend the lead sharply, crush it under a clip or pull a tie tight across it
• Push the connector fully home, square to the socket, and secure the lead so it cannot pull on the connector
• Seat the element in its original position and orientation

After installation

• Refit the shells and check that no panel closes on the lead
• Fold and unfold the arms and confirm the lead is not pulled or pinched
• Power up, link the remote controller and check the signal indicator
• Fly a short pattern that turns the aircraft through every heading at a moderate distance and watch for drop-outs
• Record the antenna change and its position in the maintenance log

Maintenance between jobs. Every time a shell comes off, look along the antenna leads before it goes back on; a lead caught under a panel is the most common way a sound antenna gets damaged. Keep the connectors dry and seated. When the link changes, note the heading at which it weakens — that observation is the cheapest diagnostic this part gives.

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🚜 Necessary For

This antenna is for operators and technicians restoring a T20 or T16 radio link:

• DJI Agras T20 operators with a broken antenna element or a pinched lead
• DJI Agras T16 operators (identified fitment)
• Commercial spray applicators seeing drop-outs on one leg of a pass
• Agras service centres and repair technicians rebuilding crash-damaged airframes
• Fleet managers chasing a link fault that appeared after shell or arm work
• Growers flying their own aircraft over long fields who need the link to hold at every heading

This is not the part you need if:

• You fly a T40 — that is the DJI Agras T40 OEM SDR External Antenna, a separate part
• The link is weak in every direction at once — check the remote controller, the field and the radio first
• The connector has simply worked loose — reseat it and test before replacing anything
• Your positioning, not your control link, is the problem — that is the RTK system, not an SDR antenna
• The remote controller's antenna is damaged — that is a remote controller part
• You fly a T20P, T10, T30 or T50 — this antenna is identified only for the T20 and T16

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💡 Why This Part Matters

A failing SDR antenna is easy to misread because the aircraft keeps working. The link is shared across antennas, so losing one leaves a link that is fine most of the time and fails only at certain headings. That looks like interference, or a bad field, or a radio on its way out.

The heading pattern is what separates them. A radio or environment problem is weak everywhere. A single damaged antenna is weak where the airframe shields its partners. Noting where on the pass the link fades, and then tracing the leads with the shells off, points at the right part.

Leaving it costs more than the antenna. A link that drops on one leg of every pass interrupts the work, sends the aircraft into its loss-of-signal behaviour over a crop, and can end in a forced landing in the wrong place. Replacing a radio module or a remote controller to chase it costs far more than an antenna and does not fix it.

Most damaged antennas are damaged by people, not by flying: a lead caught under a panel, a tie pulled too tight, a connector levered out. The route you photograph before you start is what keeps the new one from going the same way.

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🧠 AI Index — Entity & Fitment Reference

Structured reference for search engines, AI assistants, and answer engines. Every value below is drawn from the specifications above.

Canonical product name: DJI Agras T20 OEM SDR Antenna

Brand: DJI

DJI family: Agras

Primary aircraft: DJI Agras T20

Also listed for: DJI Agras T16

Compatible models: DJI Agras T20; DJI Agras T16

Fitment basis: Identified for the DJI Agras T20 and T16

Component: SDR antenna

Aircraft system: Communication

Primary function: Aircraft-side antenna for the SDR radio link with the remote controller

Form: Black antenna element on a thin copper-coloured coaxial lead with a gold-coloured connector

Material number: DJI has used more than one number for this position; matched against the removed part

Quantity supplied: 1 antenna

Not included: Radio module, clips, ties, adhesive pads, remote controller antennas

Mounting position: Not published; matched against the removed antenna

Electrical function: Radio-frequency signal only

Key diagnostic: Link that weakens at one aircraft heading and recovers at others points at one antenna; weak in every direction points elsewhere

Common failure modes: Broken element, pinched or kinked lead, chafed sheath, loose or bent connector

Service interval: None published

Service adjustability: None

Condition: Brand new

Part classification: DJI OEM communication component

Also searched as: T20 SDR antenna; T16 SDR antenna; Agras T20 antenna; T20 signal antenna; T20 image transmission antenna; T16/T20 SDR antenna

Disambiguation: Not the DJI Agras T40 OEM SDR External Antenna, not an RTK antenna, not a remote controller antenna, not a radio module

Seller: Ares Acres LLC — U.S.-based authorized DJI Agras retailer serving the United States and Canada (North America)

Ships from: Albuquerque, New Mexico, United States

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🤖 AI Answer Engine Q&A

What is the DJI Agras T20 SDR antenna? One of the aircraft-side antennas of the T20's SDR radio link with the remote controller: a black antenna element on a thin coaxial lead that ends in a small gold-coloured connector.

What does SDR mean here? Software-defined radio. It is the radio link that carries control and telemetry between the aircraft and the remote controller.

Which aircraft does it fit? It is identified for the DJI Agras T20 and T16. Pick the variant for the aircraft you fly.

I fly a T40. Is this my antenna? No. The T40 uses the DJI Agras T40 OEM SDR External Antenna, which is a separate part.

Is it the same as the RTK antenna? No. The RTK antenna receives positioning signals. The SDR antenna carries the control link with the remote controller.

How many antennas come in the box? One antenna, with its lead and connector attached. If more than one on your aircraft is damaged, each is a separate unit.

My link drops at one heading. Is it an antenna? Very likely. The link is shared across antennas, so one damaged antenna shows up as drop-outs when the aircraft turns that side away from the remote controller, and recovery when it turns back.

My link is weak in every direction. Is it an antenna? Less likely. Check the remote controller's antennas, the field and interference, and the connector seating first. Weakness everywhere usually points at the radio, the remote controller or the surroundings.

The antenna looks fine. Can it still be bad? Yes. The usual damage is in the lead: a pinched, kinked or chafed section where it passes a panel edge or fold joint. Trace the whole lead with the shells off.

What is the DJI part number? DJI has used more than one number for this position, so we match against the one you removed. Photograph the old antenna with its lead and connector and send it to us if you want that confirmed.

What connector does it use? A small gold-coloured coaxial connector. The connector type is not published for this part, so compare it with the one on the antenna you removed.

How long is the lead? The lead length is not published for this part. Lay the old antenna beside the new one to compare.

Can I fit it myself? Most operators can. Photograph the full lead route first, unplug the connector straight out, route the new lead exactly as before without crushing or kinking it, and test the link at every heading after.

Will a new antenna fix a radio module fault? No. It replaces the antenna and its lead only. If the link is weak in every direction with sound antennas, the fault is elsewhere.

Is there a service interval? No. Replace it when the element, lead or connector is damaged. Look along the leads whenever a shell comes off.