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How many ports does a directional coupler have

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​A standard directional coupler has 4 ports: INPUT (accepts 1-100W signals), OUTPUT (through port with <0.5dB insertion loss), COUPLED (extracts -10 to -30dB of input power), and ISOLATED (terminated with 50Ω load achieving >20dB isolation). High-performance models operate from DC-40GHz with directivity >30dB. The coupling factor (e.g., 10/20/30dB) remains stable within ±0.5dB across 85% bandwidth. […]

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Dolph Microwave

10 Leading Microwave Waveguide Producers Globally

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The top 10 global microwave waveguide manufacturers include L3Harris (US), Thales (France), and NEC (Japan), specializing in precision-machined aluminum/copper guides for 1-110 GHz applications. Key players like Rosenberger (Germany) and Pasternack (US) offer WR-90 to WR-650 standards with 0.1dB/m loss at 10GHz. Chinese firms CETC and Huawei supply 5G-compatible waveguides, while MVG (France) dominates aerospace-grade

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What is the difference between horn antenna and dipole antenna

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Horn antennas are directional with 10-25 dBi gain, operating at 1-100 GHz for radar/satellite links, achieving 60-90% aperture efficiency. Dipoles are omnidirectional (1.5-2.15 dBi gain), typically for 100MHz-6GHz communications, with λ/2 length (e.g., 16cm at 900MHz). Horns offer 20dB front-to-back ratio, while dipoles radiate equally in azimuth. Horns need waveguide feeds; dipoles use simple coaxial

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What is the difference between horn antenna and parabolic dish antenna

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Horn antennas offer wide bandwidth (typically 10:1 ratio) with 10-20 dBi gain, ideal for short-range applications like radar feeds. Parabolic dishes achieve higher gain (30-50 dBi) through reflector focusing, but narrower bandwidth (5-10% of center frequency). Dishes provide 3° beamwidth at 10GHz vs. horns’ 25°, making dishes better for long-distance satellite links (60cm dishes reach

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Up to 330GHz. mmWave & Microwave Products

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Excited to share you the highlights of our precision mmWave products in 2024: Standard Gain Horns, WG to Coaxial Adapters, Attenuators, Couplers, Power Dividers, Terminations, Isolators, Straights/Bends/Twists etc. We provide microwave products, assembly and engineering services for up to 330GHz. Customers ranges from telecom, government to university research, involving in military RADAR systems, EW units, Commercial RF solutions

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Packaging and Integration Technology of Double Ridge Waveguide Components

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In the realm of modern telecommunication and radar systems, the evolution of waveguide technology has been pivotal in facilitating the transmission of electromagnetic waves with enhanced efficiency and reliability. Among various waveguide designs, the double ridge waveguide stands out as a significant innovation, offering unique characteristics that cater to specific industry needs. Understanding its structure,

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How was complete coverage achieved with a minimum s-band antenna gain of -7 dBi

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To achieve complete coverage with a minimum s-band antenna gain of -7 dBi, a straightforward configuration utilizing dual circularly polarized microstrip patch antennas was employed. The configuration involved the implementation of a wide bandwidth, dual circularly polarized truncated corner microstrip antenna, which was complemented by two parasitic patches. To enhance the cross polarization bandwidth, diagonally embedded holes

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[Dolph Microwave] 4.5 Meter Turning Head Antenna with Ext.Ka-band Tx27.5 to 31.0 GHz, Rx17.7-21.2GHz

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Dolph Microwave finished production 4.5 Meter Turning Head Antenna and test of Ext. Ka-band Tx27.5 to 31.0 GHz, Rx17.7-21.2GHz satcom antenna with 4 port Circular Pol. Axis Ratio 0.6dB. Product & Pedestal Features:  Wide variety of feed options designed to meet the latest international standards. S, C, X, Ku, DBS and Ka Band, Tx/Rx, 2Tx/2Rx, TT&C,

[Dolph Microwave] 4.5 Meter Turning Head Antenna with Ext.Ka-band Tx27.5 to 31.0 GHz, Rx17.7-21.2GHz Read More »

Curved Waveguide Types

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There are two types of curved waveguides: E-surface curved and H-surface curved. The curved waveguides include arc-shaped curved waveguides and cut-angle curved waveguides. Cut-angle curved waveguides can be used in situations where the arm length is short, the waveguide is large, the bandwidth is narrow, and the power is low. The standard bending angle is 90°,

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DOLPH-MW WARRANTY

Dolph Microwave warrants our products to be free from defective material and workmanship for a period of one year from the date of delivery. All defective parts will be replaced and repair work required by normal use will be performed, without charge, within this one year period. This warranty shall be exclusive and in lieu of all other warranties expressed or implied.

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Tel/Fax: (+86) 29-8881-0979
E-mail: [email protected]

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