# Directional antenna rf elements STD-21-UM 21 dBi waveguide

**URL:** https://aio.lv/en/product--rf-elements-std-21-um--4130345
**Data updated:** 2026-02-12 14:05 (EET)
**Category:** Wi‑Fi Antennas
**Manufacturer:** rf elements
**Manufacturer code:** STD-21-UM
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 75.49 €
**Prices and availability valid until:** 2026-07-05 23:59
**Price without VAT (21%):** 62.39 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--rf-elements-std-21-um--4130345

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 12.06.2026 | free |
| Pickup points | 17.06.2026 | 1.99 EUR |
| Courier delivery to door | 17.06.2026 | 4.99 EUR |

## Summary description

Directional antenna rf elements STD-21-UM is a waveguide antenna with 21 dBi gain designed for point-to-point and sector wireless links. It focuses RF energy into a narrow beam for extended range and improved signal quality. Suitable for outdoor installations where stable directional coverage, interference reduction and longer reach are required.

## Long description

Directional antenna rf elements STD-21-UM 21 dBi waveguide is a high-gain waveguide antenna designed to concentrate radio frequency energy into a narrow directional beam. Intended for outdoor use, the antenna provides focused coverage for point-to-point and narrow-sector links, improving link budget and reducing interference from off-axis sources. The compact waveguide design supports stable directional performance across its operating band and is suitable for installations where longer reach and improved signal quality are required.
Advantages
The antenna delivers 21 dBi of gain in a waveguide form factor that reduces sidelobes and concentrates energy toward the intended direction, enabling extended range for line-of-sight links. Its directional pattern minimizes reception of unwanted signals from the sides, which improves signal-to-noise ratio and link stability in environments with nearby transmitters. The physical design is optimized for outdoor mounting and alignment, providing consistent performance in fixed wireless deployments.
Suitable for
Point-to-point wireless links between buildings or towers
Narrow-sector coverage where focused directional radiation is required
Long-range outdoor links that require improved link budget
Environments where interference reduction from off-axis sources is necessary
Key specifications
Gain: 21 dBi
Type: Directional waveguide antenna
Intended use: Outdoor point-to-point and narrow-sector links
Radiation pattern: Narrow-beam directional pattern for focused coverage
Mounting: Suitable for pole or mast installation with adjustable alignment
How to use
Mount the directional antenna on a stable mast or pole with clear line-of-sight to the target station. Align the antenna precisely toward the remote endpoint to take advantage of the narrow beam and maximum gain. Connect the antenna to the radio or transceiver using an appropriate feed line and connectors, ensuring low-loss cable and proper weatherproofing at connections to maintain signal quality. Verify alignment by measuring received signal strength and adjust as needed to optimize the link.
Usage recommendations
For best results, use this high-gain directional antenna in line-of-sight installations and pair it with cabling and connectors rated for outdoor use. Ensure accurate mechanical alignment and periodic inspection of mounting hardware and weather seals to preserve performance and reliability.

## FAQ

### How much does the Directional antenna rf elements STD-21-UM 21 dBi cost, and is it available for purchase?

The price is 75.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 12.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All rf elements products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized rf elements service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/4130345/10550235_large.webp