Dielectric Coaxial Resonators (DR)

Microwave Dielectric Coaxial Resonators (DR) Introduction

Token coaxial resonators (DR) is the cornerstone of RF microwave communications

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  • Coaxial Resonators (DR) Series
  • Coaxial Resonators (DR) Series
  • Coaxial Resonators (DR) Series
  • Coaxial Resonators (DR) Series

(DR) is a kind of microwave components, also known as ceramic resonator, Token electronics manufacturing dielectric resonator (cylindrical, ring), coaxial resonator (rectangular cavity, cylindrical cavity, coaxial cavity resonator), microwave resonator, etc. It is made high-Q dielectric ceramics, temperature coefficient is good, mainly used in microwave oscillators and filters.

Dielectric resonator size and dielectric material is inversely proportional to the square root of the dielectric constant, dielectric materials, dielectric constant the greater the required dielectric ceramic block the smaller, thus the smaller the resonator size. Another important parameter is the insertion loss, low dielectric loss microwave dielectric materials, dielectric filters that affect the insertion loss of a major factor. Microwave dielectric Q value and dielectric loss is inversely proportional to the relationship. Q value is greater the lower the filter insertion loss.

Therefore, the microwave dielectric ceramic materials of high dielectric constant is conducive to the miniaturization of microwave dielectric filters, can filter with the microwave tube, a microstrip line realization of microwave hybrid integrated circuit, so that the device dimensions to mm order of magnitude, the price is also much lower than the metallic cavity.

The (DR) impedance used in TEM mode is direct function of its dimensions and of the dielectric material permittivity. Token coaxial ceramic resonators provide the customers with high Q higher parallel resonant impedance and better temperature characteristics than inductor coils and associated lumped constant elements used in RF amplifiers and oscillators circuits. According to dielectric resonator frequency stabilization mechanism, using dielectric resonator stabilized FET oscillator frequency (also referred to DRO) can be classified into 4 types, namely, reflective, band-reject type, transmission type and feedback type.

(DR) series with two ports, depending on port different boundary conditions, in accordance with the basic structure of the resonator is divided into three types: half-wavelength type, quarter-wavelength type, and capacitive load type, each structure each with distinct characteristics. Token (DR) series features with small size, high temperature stability characteristics. Indirectly, (DR) series is suitable for a variety of microwave communications equipment, particularly suitable for PCS / PCN filters, base stations, radar detectors, satellite broadcast reception systems, military microwave facilities. Comply with RoHS standards.

Custom parts are available on request. Token will also produce devices outside these specifications to meet specific customer requirements, please contact our sales for more information.

Download Dielectric Coaxial Resonators (DR) PDF Datasheet .

Features :
  1. High quality factor.
  2. High dielectric constant.
  3. Low temperature coefficient.
  4. Wide range of resonant frequency.
Applications :
  1. CDMA/PCS/WLL/IMT2000.
  2. Filters, Duplexer, Oscillators (DRO/VCO).
  3. Wireless headphone, wireless security system.
  4. 900MHz, 1.8GHz, 2.4GHz, 5.8GHz wireless phone.

Dimensions (Unit: mm) (DR)

(DR) Dimensions
(DR) Dimensions
Part Number W(O/D) A(I/D) B C T
DR120 12.0±0.2 ① Φ4.0±0.2 without tab 3.2 1.0
② Φ3.55±0.2 1.5
DR100 10.0±0.2 ① Φ3.3±0.2 1.3 3.0 1.0
DR80 8.0±0.2 ① Φ2.7±0.2 1.3 2.6 0.7
DR60 6.0±0.2 ① Φ2.5±0.2 without tab 2.4 0.7
② Φ2.2±0.2 without tab
③ Φ2.0±0.2 1.2
DR50 5.0±0.2 ① Φ1.8±0.2 1.0 2.2 0.6
② Φ1.5±0.2 1.0
DR40 4.0±0.1 ① Φ1.8±0.1 0.8 1.8 0.6
② Φ1.5±0.1 without tab
③ Φ1.2±0.1 without tab
DR30 3.0±0.1 ① Φ1.0±0.1 0.7 1.5 0.5
DR20 2.1±0.1 ① Φ0.6±0.1 0.5 1.2 0.5

Available Range of TEM Mode (DR)

Material Dielectric
Constant
Tf [1] Type Characteristic
Impedance (Ω)
Wave
Length
Frequency
Range (MHz)
Q [2]
(min)
A
Series
21±1 0±10 DR120 ①15 ②17 λ/4 800~1300 800
λ/2 1600~2700 1000
DR100 16 λ/4 800~1300 700
λ/2 1600~3200 800
DR80 15 λ/4 1000~3200 650
λ/2 2000~3000 700
DR60 ①12 ②14 ③15 λ/4 1000~2700 550
λ/2 2000~3000 600
DR50 ①14 ②17 λ/4 1300~3000 450
λ/2 2500~4000 500
DR40 ①11 ②14 ③17 λ/4 1300~4000 380
λ/2 2500~4000 400
DR30
DR20
15 λ/4 1900~4000 320
17 λ/4 2800~5000 250
B
Series
36±1 0±10 DR120 ①12 ②13 λ/4 600~1000 700
λ/2 1200~2400 900
DR100 12 λ/4 600~1200 600
λ/2 1200~2400 800
DR80 12 λ/4 800~1500 500
λ/2 1600~3000 700
DR60 ①10 ②11 ③12 λ/4 800~1800 450
λ/2 1600~3500 550
DR50 ①11 ②13 λ/4 800~1800 380
λ/2 1600~3500 450
DR40 ①9 ②11 ③13 λ/4 1000~2700 320
λ/2 2000~4800 400
DR30
DR20
12 λ/4 1300~3000 220
13 λ/4 1300~3000 220
C
Series
90±2 0±10 DR120 ①7 ②8 λ/4 400~800 650
λ/2 800~1500 700
DR100 7 λ/4 600~800 550
λ/2 1200~2400 650
DR80 7 λ/4 440~1000 450
λ/2 1000~1500 550
DR60 ①6 ②7 ③7 λ/4 440~1300 400
λ/2 1000~2200 470
DR50 ①7 ②8 λ/4 500~1800 380
λ/2 1000~3000 450
DR40 ①6 ②7 ③8 λ/4 900~1600 200
λ/2 2000~4800 300
DR30
DR20
7 λ/4 900~1600 250
8 λ/4 900~1600 150
[1] Frequency stability of temperature.
[2] Q value depends on lower limit of frequency range.

Order Codes (DR)

DR 30 A 1 W4 2533 T
Dielectric Resonators
Part Number
Dimension
Material
Impedance
1
2
3
Wave Length
W2 λ/2
W4 λ/4
Center Frequency
(MHz)
Configuration
T tab
N without tab